# Page Not Found

The URL `files/JpDlTDY7P1AqwaDyUGYl` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

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- [30 giây cài đặt & mở lớp](https://docs.ghidanhviet.com/hdsd-danh-cho-lop-hoc-them/30-giay-cai-dat-and-mo-lop.md)
- [Khác biệt giữa lịch "lặp lại", "tự do" và "gối đầu" là gì?](https://docs.ghidanhviet.com/fqa/khac-biet-giua-lich-lap-lai-tu-do-va-goi-dau-la-gi.md)
- [Sau khi mở lớp, có đổi tên, xóa hoặc khôi phục lớp được không?](https://docs.ghidanhviet.com/fqa/sau-khi-mo-lop-co-doi-ten-xoa-hoac-khoi-phuc-lop-duoc-khong.md)
- [Làm sao để tạo một kỳ tuyển sinh mới?](https://docs.ghidanhviet.com/fqa/lam-sao-de-tao-mot-ky-tuyen-sinh-moi.md)
- [Làm sao thu học phí theo số buổi đã điểm danh?](https://docs.ghidanhviet.com/fqa/lam-sao-thu-hoc-phi-theo-so-buoi-da-diem-danh.md)

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

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

```
GET https://docs.ghidanhviet.com/hdsd-danh-cho-lop-hoc-them/30-giay-cai-dat-and-mo-lop.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://docs.ghidanhviet.com/sitemap.md

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.ghidanhviet.com/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., `/hdsd-danh-cho-lop-hoc-them/30-giay-cai-dat-and-mo-lop.md`).

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