Theory — 2 khái niệm THƯỜNG BỊ NHẦM
Coherence & Cohesion (C&C) = 1 trong 4 tiêu chí chấm, chiếm 25% điểm. Học viên VN hay nhầm hai khái niệm này thành 1.
🎯 Cohesion vs Coherence
| Cohesion | Coherence | |
|---|---|---|
| Nghĩa | "Dính" — kỹ thuật kết nối câu / ý ở surface level | "Rõ ràng" — logic dòng chảy ý tưởng ở deep level |
| Cách nhận biết | Nhìn thấy được — linkers, pronouns, referencing | Cảm nhận được — bài có "hiểu được" không, có "chảy" không |
| Tools | Linking words, pronouns (this/these/it), substitution (do so, such) | Paragraph structure, topic sentences, logical progression |
| Sai lỗi khi | Thiếu linker, lặp cùng noun, không referencing | Ý nhảy loạn, đoạn không có main idea, không progression |
| Ví dụ vi phạm | “Cars pollute. Cars are noisy. Cars are expensive.” → cần "They are also… They are additionally…" | “Public transport is good. My grandfather likes tea. Buses have wheels.” → 3 câu đúng grammar nhưng không liên quan |
💡 Ẩn dụ dễ nhớ
- Cohesion = cây cầu giữa 2 câu / ý
- Coherence = bản đồ cho cả bài đi đâu
Bài có thể cohesive nhưng không coherent (cầu đẹp nhưng dẫn lung tung) — và ngược lại.
🎨 Kỹ thuật COHESION — cấp câu
1. Linking words (Xem G-01 masterclass)
Dùng đa dạng 15–20 linker/bài. Chọn ĐÚNG function.
2. Pronoun referencing
Thay noun lặp bằng it / they / this / these / such:
❌ Không cohesion:
“Traffic congestion is a serious problem. Traffic congestion affects millions. Traffic congestion is worsening.”
✅ Cohesion tốt:
“Traffic congestion is a serious problem. It affects millions of urban commuters and this issue is worsening year by year.”
3. Demonstrative reference
Dùng "this X / these Y" để refer back:
- “…air pollution rises. This trend shows no sign of slowing.”
- “…children get less exercise. These changes in lifestyle affect development.”
- “…governments must act. Such measures will be politically difficult.”
4. Substitution — thay verb / noun bằng "do so / do this"
❌:
“Governments should tax sugary drinks. If governments tax sugary drinks, obesity will decline.”
✅:
“Governments should tax sugary drinks. If they do so, obesity will decline.”
5. Ellipsis — bỏ phần lặp lại
❌:
“Some people work from home; some people work from an office; some people work from a co-working space.”
✅ (ellipsis):
“Some people work from home; others [work] from an office; still others [work] from a co-working space.”
🗺️ Kỹ thuật COHERENCE — cấp bài
1. Cấu trúc đoạn PEEL (Xem T2-04)
Mỗi body paragraph phải có:
- P — Point (câu chủ đề, 1 ý chính)
- E — Explanation (giải thích vì sao)
- E — Example (ví dụ cụ thể)
- L — Link (chốt lại với thesis)
Bài cohesive nhưng không coherent:
“To begin with, public transport is efficient. Furthermore, it produces fewer emissions. Additionally, it reduces stress. Moreover, my grandmother enjoys buses. Consequently, we should invest more.”
Linker đầy đủ nhưng ý 4 (grandmother) lạc = coherence kém.
2. Topic sentence (câu chủ đề)
Mỗi đoạn body BẮT BUỘC có 1 topic sentence ở đầu, nêu rõ ý chính của đoạn.
❌ Không topic sentence:
“In 2023, Vietnam had many issues. Housing prices rose 15%. Traffic worsened. Air quality dropped. Salaries grew slowly.”
✅ Có topic sentence:
“Rapid urbanisation has created significant challenges in Vietnam. Housing prices rose 15%, traffic worsened, air quality dropped, and salaries grew too slowly to keep pace.”
Câu bôi đậm = topic sentence → giám khảo biết ngay đoạn nói về urbanisation challenges.
3. Logical progression — dòng chảy ý
3 loại progression tốt trong Task 2:
a) General → Specific: từ chung → cụ thể
“Education matters for economic development. Specifically, tertiary education produces skilled workers. In Vietnam, for example, graduates earn 3× more than non-graduates.”
b) Cause → Effect → Solution: dùng cho Problem-Solution essay
“Ultra-processed food consumption has surged. As a result, obesity rates among children have doubled. To address this, governments should tax sugary drinks.”
c) Claim → Counter → Rebuttal: dùng cho Opinion essay
“Free tertiary education is a wise investment. Admittedly, critics argue that it burdens taxpayers. However, evidence from Germany shows the long-term gains far exceed costs.”
4. Old-to-New pattern (thông tin cũ ở đầu, mới ở cuối)
Quy tắc vàng: mỗi câu bắt đầu bằng thông tin đã nêu trước (old), kết thúc bằng thông tin mới (new). Câu sau bắt đầu bằng new vừa nêu → thành old cho câu tiếp theo.
Ví dụ:
"Governments should invest in public transport. Public transport [old] reduces congestion and pollution. Congestion and pollution [old→new becomes old] impose heavy costs on urban economies. These economic costs [old] can be mitigated through mass transit."
Chuỗi này tạo dòng chảy tự nhiên — coherence cao.
📋 Checklist tự kiểm tra sau khi viết xong
✔️ Cohesion Checklist
- Đếm được ≥ 15 linkers khác nhau trong bài?
- Không linker nào lặp quá 2 lần?
- Có ≥ 3 pronoun references (this/these/it/such)?
- Không lặp cùng 1 noun quá 3 lần trong 1 đoạn?
✔️ Coherence Checklist
- Mỗi body paragraph có topic sentence rõ ràng ở đầu?
- Mỗi body có 1 ý chính duy nhất (không nhét 2 ý)?
- Có logical progression rõ (general→specific hoặc cause→effect→solution)?
- Conclusion khớp với thesis đã nêu ở intro?
- Đọc lại 1 lần từ đầu đến cuối — có "chảy" không?
Typing — Gõ 1 đoạn CÓ cohesion + coherence tốt
Gõ chính xác đoạn dưới (đề: youth obesity — causes):
The primary cause of rising youth obesity lies in the widespread
availability of ultra-processed food. This category of products —
including sugary beverages, fast food, and packaged snacks — has
come to dominate children's diets, particularly in urban areas.
A 2023 WHO report revealed that global consumption of such items
among children aged 6–14 has doubled since 2010, driving excessive
calorie intake without providing adequate nutrition. Consequently,
without meaningful regulation of these products, the obesity
epidemic among the young is unlikely to abate in the coming decade.Cohesion analysis (câu ⇄ câu):
- Câu 1 (P): topic sentence nêu ý chính "ultra-processed food"
- Câu 2: "This category of products" → refer về "ultra-processed food"
- Câu 3: "A 2023 WHO report" → thêm evidence, "such items" refer về products
- Câu 4: "Consequently" → hậu quả, "these products" khép vòng
4 câu → all connected = cohesion cao. Ý chính 1 duy nhất = coherence cao.
Grammar — Sửa đoạn thiếu cohesion
Đoạn gốc (thiếu cohesion — nhàm chán, lặp noun):
“Renewable energy is important. Renewable energy reduces emissions. Renewable energy creates jobs. Countries should invest in renewable energy. Renewable energy is the future.”
✅ Sửa lại
Gợi ý
"Renewable energy has emerged as a cornerstone of sustainable development. It substantially reduces greenhouse gas emissions while simultaneously creating skilled jobs in emerging green industries. For these reasons, countries that invest in this sector early will not only secure long-term energy independence but also position themselves as leaders in the transition to a low-carbon future."
Từ 5 câu lặp → 1 câu phức + 1 câu conclusion, dùng it / this sector / for these reasons để refer back.
Game — Đánh giá 3 đoạn văn
Đọc 3 đoạn dưới. Chọn: cohesive + coherent / cohesive but not coherent / not cohesive.
Đoạn A
“Governments should ban plastic bags. Plastic bags pollute oceans. Marine animals suffer. Plastic bags are made from oil. Some countries have banned plastic bags successfully.”
Đáp án
Not cohesive (thiếu linker + lặp "plastic bags" 4 lần).
Sửa: "Governments should ban plastic bags. These items pollute oceans and endanger marine life. Additionally, they are produced from finite oil resources. Several countries have already implemented such bans successfully, demonstrating that the policy is both feasible and effective."
Đoạn B
“Public transport is efficient. Furthermore, it produces fewer emissions. Additionally, it reduces stress. Moreover, my grandmother enjoys taking the bus. Consequently, we should invest more in it.”
Đáp án
Cohesive but NOT coherent — nhiều linker (furthermore, additionally, moreover, consequently) nhưng câu 4 (grandmother) lạc topic = coherence kém.
Sửa: bỏ câu 4, giữ 4 câu còn lại.
Đoạn C
"Rapid urbanisation has generated unprecedented economic opportunities across the developing world. It has, however, simultaneously placed enormous strain on housing markets and public infrastructure. Nowhere is this tension more visible than in cities such as Bangkok and Manila, where soaring housing prices and chronic traffic congestion now dominate daily life. Consequently, urban planners face a critical challenge: managing growth without compromising liveability."
Đáp án
Both cohesive AND coherent ✅ —
- Cohesion: "it", "this tension", "such as", "consequently" đủ linker
- Coherence: general (urbanisation) → specific (Bangkok/Manila) → implication (challenge) = clear logical flow
Đây là mức band 7.0–7.5.
Điểm cần nhớ
- Cohesion = cấp câu (linkers, pronouns, referencing); Coherence = cấp bài (structure, logic flow)
- Có thể cohesive nhưng không coherent (linker đầy đủ nhưng ý lạc)
- Topic sentence đầu mỗi đoạn = chìa khoá coherence
- Old-to-new pattern: mỗi câu bắt đầu bằng thông tin đã nêu, kết bằng thông tin mới
- Dùng "this / these / such X" thay lặp noun → tăng cohesion
- Tự kiểm tra: đếm linker, đếm topic sentence, kiểm ý lạc
- Bài tiếp theo (W-01) sẽ liệt kê 50 lỗi phổ biến của học viên VN kèm cách sửa