# Page Not Found

The URL `files/-MEQQL1pSh6TEqUPMU3L` 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 Phong Vũ](https://help.phongvu.vn/master.md)
- [Chính sách khui hộp sản phẩm Apple](https://help.phongvu.vn/chinh-sach-ban-hang/chinh-sach-khui-hop-san-pham-apple.md)
- [Dịch vụ Giao hàng và Hỗ trợ kỹ thuật tận nơi](https://help.phongvu.vn/chinh-sach-ban-hang/giao-hang-va-lap-dat-tai-nha.md)
- [Hướng dẫn thanh toán VNPAY-QR](https://help.phongvu.vn/chinh-sach-ban-hang/huong-dan-thanh-toan-vnpay-qr.md)
- [Chính sách thanh toán](https://help.phongvu.vn/chinh-sach-ban-hang/chinh-sach-thanh-toan.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.phongvu.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://help.phongvu.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://help.phongvu.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.