# Page Not Found

The URL `sau-ban-hang/nhom-tinh-nang-quan-ly-hoc-vu-academic/quan-ly-lop-hoc/thong-tin-hoc-vien-thong-tin-dang-ki-hoc` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Quản lý Đơn hàng - Đăng kí học](https://ems.help.dotb.vn/dotb-ems/dang-ki-hoc-va-thu-tien/quan-li-dang-ki-hoc-thu-tien/quan-ly-don-hang-dang-ki-hoc.md)
- [Xuất hóa đơn điện tử (E-invoice)](https://ems.help.dotb.vn/dotb-ems/dang-ki-hoc-va-thu-tien/quan-li-dang-ki-hoc-thu-tien/quan-ly-don-hang-dang-ki-hoc/xuat-hoa-don-dien-tu-e-invoice.md)
- [Tạo, cập nhật đơn hàng bán](https://ems.help.dotb.vn/dotb-ems/dang-ki-hoc-va-thu-tien/quan-li-dang-ki-hoc-thu-tien/quan-ly-don-hang-dang-ki-hoc/tao-cap-nhat-don-hang-ban.md)
- [Cập nhật thông tin khác](https://ems.help.dotb.vn/dotb-ems/tuyen-sinh-ban-hang/leads-hoc-vien-tiem-nang/cap-nhat-thong-tin-khac.md)
- [Tạo giáo viên, thông tin đăng nhập giáo viên](https://ems.help.dotb.vn/dotb-ems/bo-phan-giao-vu/quan-ly-giao-vien-tro-giang/tao-giao-vien-thong-tin-dang-nhap-giao-vien.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://ems.help.dotb.vn/dotb-ems/dang-ki-hoc-va-thu-tien/quan-li-dang-ki-hoc-thu-tien/quan-ly-don-hang-dang-ki-hoc.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://ems.help.dotb.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://ems.help.dotb.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., `/dotb-ems/dang-ki-hoc-va-thu-tien/quan-li-dang-ki-hoc-thu-tien/quan-ly-don-hang-dang-ki-hoc.md`).

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