# Page Not Found

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

## Suggested Pages

You may be looking for one of the following:
- [TÀI LIỆU API](https://helpdesk4.getfly.vn/huong-dan-su-dung/tai-lieu-api.md)
- [Các câu hỏi về module Khách hàng](https://helpdesk4.getfly.vn/huong-dan-su-dung/faq-cau-h-i-thuong-gap/cac-cau-hoi-ve-module-khach-hang.md)
- [Câu hỏi về module Bán hàng](https://helpdesk4.getfly.vn/huong-dan-su-dung/faq-cau-h-i-thuong-gap/cau-hoi-ve-module-ban-hang.md)
- [Câu hỏi về module Mua hàng](https://helpdesk4.getfly.vn/huong-dan-su-dung/faq-cau-h-i-thuong-gap/cau-hoi-ve-module-mua-hang.md)
- [Mail server - mail tên miền](https://helpdesk4.getfly.vn/huong-dan-su-dung/doi-tac-ket-noi/email/mail-server-mail-ten-mien.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://helpdesk4.getfly.vn/huong-dan-su-dung/tai-lieu-api.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://helpdesk4.getfly.vn/huong-dan-su-dung/sitemap.md

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://helpdesk4.getfly.vn/huong-dan-su-dung/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/tai-lieu-api.md`).

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