# Page Not Found

The URL `files/C5HgkKqZ0Hk6wVeWwNO7` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Kích hoạt sách](https://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/kich-hoat-sach.md)
- [Đổi sách đã kích hoạt](https://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/kich-hoat-sach/doi-sach-da-kich-hoat.md)
- [Tham gia lớp học](https://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/hoc-tap-va-on-luyen/tham-gia-lop-hoc.md)
- [Xem kết quả bài tập](https://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/hoc-tap-va-on-luyen/xem-ket-qua-hoc-tap/xem-ket-qua-bai-tap.md)
- [Xem kết quả học tập](https://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/hoc-tap-va-on-luyen/xem-ket-qua-hoc-tap.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://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/kich-hoat-sach.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://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/sitemap.md

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://help.ipvision.edu.vn/huong-dan-su-dung-hoc-lieu-so-ipvision/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., `/huong-dan-su-dung-hoc-lieu-so-ipvision/kich-hoat-sach.md`).

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