# Page Not Found

The URL `files/42aYJdLyHdGSDeZqra5O` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [TÍNH NĂNG QR CODE ORDER TẠI BÀN](https://docs.posapp.vn/qr-order-ban/tinh-nang-qr-code-order-tai-ban.md)
- [HỦY ORDER - TRẢ MÓN](https://docs.posapp.vn/thao-tac-ban-hang/huy-order-tra-mon.md)
- [Giới thiệu tính năng đặt hàng qua Website của PosApp](https://docs.posapp.vn/website-dat-hang-giao-hang/thiet-lap.md)
- [Thiết lập Menu cha con](https://docs.posapp.vn/quan-ly-san-pham/thiet-lap-menu-cha-con.md)
- [4/ Các sử dụng thẻ trả trước](https://docs.posapp.vn/the-tra-truoc/the-tra-truoc/4-cac-su-dung-the-tra-truoc.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://docs.posapp.vn/qr-order-ban/tinh-nang-qr-code-order-tai-ban.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://docs.posapp.vn/sitemap.md

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.posapp.vn/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., `/qr-order-ban/tinh-nang-qr-code-order-tai-ban.md`).

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