# Page Not Found

The URL `files/GWq3Oj9u3vcoTzvIjd0Q` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Tải và cài đặt](https://help.acheckin.io/bat-dau-su-dung/tai-va-cai-dat.md)
- [Tổng hợp đơn nhân viên đã gửi](https://help.acheckin.io/danh-cho-quan-tri-vien/cham-cong/tong-hop-don-nhan-vien-da-gui.md)
- [Hướng dẫn sử dụng tài liệu](https://help.acheckin.io/bat-dau-su-dung/huong-dan-su-dung-tai-lieu.md)
- [Workplace](https://help.acheckin.io/huong-dan-dung-ung-dung-acheckin/workplace.md)
- [Các bước thiết lập](https://help.acheckin.io/danh-cho-quan-tri-vien/cham-cong/cac-buoc-thiet-lap.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.acheckin.io/bat-dau-su-dung/tai-va-cai-dat.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.acheckin.io/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.acheckin.io/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., `/bat-dau-su-dung/tai-va-cai-dat.md`).

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