# Page Not Found

The URL `files/B1USOrOZbuAOnT7SezcR` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [26. Số cuộc gọi đồng thời là gì?](https://help.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/iv.-cau-hoi-thuong-gap/26.-so-cuoc-goi-dong-thoi-la-gi.md)
- [3. Liên hệ](https://help.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/iii.-mobile-app/android-app/3.-lien-he.md)
- [1. Đăng nhập](https://help.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/iii.-mobile-app/android-app/1.-dang-nhap.md)
- [6. Phân quyền cho thiết bị tai nghe/micro](https://help.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/iv.-cau-hoi-thuong-gap/6.-phan-quyen-cho-thiet-bi-tai-nghe-micro.md)
- [Báo  cáo SMS](https://help.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/ii.-chuc-nang-he-thong/6.-bao-cao/6.1-bao-cao-thong-ke/6.1.5-sms/bao-cao-sms.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.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/iv.-cau-hoi-thuong-gap/26.-so-cuoc-goi-dong-thoi-la-gi.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.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/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.stringeex.com/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/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., `/stringeex-tong-dai-cham-soc-and-quan-ly-khach-hang/iv.-cau-hoi-thuong-gap/26.-so-cuoc-goi-dong-thoi-la-gi.md`).

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