# Page Not Found

The URL `files/UTBc0NOTexKvhrTVYpJP` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Giới thiệu](https://hotro-hoadonbachkhoa.pmbk.vn/master.md)
- [Tiện ích](https://hotro-hoadonbachkhoa.pmbk.vn/tien-ich.md)
- [Điều chỉnh tăng thuế suất](https://hotro-hoadonbachkhoa.pmbk.vn/4.-xu-ly-hoa-don/dieu-chinh-tang/dieu-chinh-tang-thue-suat.md)
- [1.9 Tùy chọn](https://hotro-hoadonbachkhoa.pmbk.vn/cac-buoc-de-bat-dau-su-dung-phan-mem/1.9-tuy-chon.md)
- [1.1 Truy cập vào phần mềm hóa đơn điện tử Bách Khoa](https://hotro-hoadonbachkhoa.pmbk.vn/cac-buoc-de-bat-dau-su-dung-phan-mem/thao-tac-truy-cap-phan-mem.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://hotro-hoadonbachkhoa.pmbk.vn/master.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://hotro-hoadonbachkhoa.pmbk.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://hotro-hoadonbachkhoa.pmbk.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., `/master.md`).

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