# Page Not Found

The URL `cac-dang-de-va-bai-mau-viet-thu-vstep-b2-xuat-sac` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Tổng hợp các dạng đề và bài mẫu viết thư bằng tiếng Anh B2](https://vstepvietnam.gitbook.io/b2/tong-hop-cac-dang-de-va-bai-mau-viet-thu-bang-tieng-anh-b2.md)
- [Hướng dẫn làm bài thi writing VSTEP B2 theo cấu trúc mới](https://vstepvietnam.gitbook.io/b2/huong-dan-lam-bai-thi-writing-vstep-b2-theo-cau-truc-moi.md)
- [Các trường được cấp chứng chỉ tiếng Anh B2 mới nhất](https://vstepvietnam.gitbook.io/b2/cac-truong-duoc-cap-chung-chi-tieng-anh-b2-moi-nhat.md)
- [Hướng dẫn luyện nghe tiếng Anh B2 VSTEP với đề thi thật](https://vstepvietnam.gitbook.io/b2/huong-dan-luyen-nghe-tieng-anh-b2-vstep-voi-de-thi-that.md)
- [Bằng B2 tiếng anh có thời hạn bao lâu?](https://vstepvietnam.gitbook.io/b2/bang-b2-tieng-anh-co-thoi-han-bao-lau.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://vstepvietnam.gitbook.io/b2/tong-hop-cac-dang-de-va-bai-mau-viet-thu-bang-tieng-anh-b2.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://vstepvietnam.gitbook.io/b2/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://vstepvietnam.gitbook.io/b2/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/b2/tong-hop-cac-dang-de-va-bai-mau-viet-thu-bang-tieng-anh-b2.md`).

You may also use `Accept: text/markdown` header for content negotiation.