# Page Not Found

The URL `files/ufZtPh5rM3HOv2opEikH` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [51. Thay đổi số điện thoại khách hàng](https://docs.pushsale.vn/thu-vien-cau-hoi/51.-thay-doi-so-dien-thoai-khach-hang.md)
- [113. [Pushcall] Ghi âm lỗi, không có file ghi âm](https://docs.pushsale.vn/thu-vien-cau-hoi/113.-pushcall-ghi-am-loi-khong-co-file-ghi-am.md)
- [61. Đơn hoàn làm thế nào để cộng tồn kho ?](https://docs.pushsale.vn/thu-vien-cau-hoi/61.-don-hoan-lam-the-nao-de-cong-ton-kho.md)
- [133. Cấu hình sản phẩm cho nguồn dữ liệu](https://docs.pushsale.vn/thu-vien-cau-hoi/133.-cau-hinh-san-pham-cho-nguon-du-lieu.md)
- [2.1 MKT dashboard và 4.2 Hồ sơ khách hàng](https://docs.pushsale.vn/mot-so-luu-y-khi-so-sanh-du-lieu/2.1-mkt-dashboard-va-4.2-ho-so-khach-hang.md)

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### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

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GET https://docs.pushsale.vn/thu-vien-cau-hoi/51.-thay-doi-so-dien-thoai-khach-hang.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

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.pushsale.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., `/thu-vien-cau-hoi/51.-thay-doi-so-dien-thoai-khach-hang.md`).

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