# Page Not Found

The URL `files/L5RrWXyuImw8FzHnk3y2` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [4/ Mua X tặng Y](https://docs.posapp.vn/thiet-lap-chuong-trinh-khuyen-mai/4-mua-x-tang-y.md)
- [Cách cài đặt Menu theo ngày](https://docs.posapp.vn/quan-ly-san-pham/cach-cai-dat-menu-theo-ngay.md)
- [5/ Combo khuyến mãi](https://docs.posapp.vn/thiet-lap-chuong-trinh-khuyen-mai/5-combo-khuyen-mai.md)
- [APP - Thiết lập phòng bàn](https://docs.posapp.vn/thiet-lap-ban-dau/app-thiet-lap-phong-ban.md)
- [9/ Phụ thu](https://docs.posapp.vn/thiet-lap-chuong-trinh-khuyen-mai/9-phu-thu.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/thiet-lap-chuong-trinh-khuyen-mai/4-mua-x-tang-y.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., `/thiet-lap-chuong-trinh-khuyen-mai/4-mua-x-tang-y.md`).

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