> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/vi/co-so-tri-thuc/019-can-i-use-regular-expressions-for-replace-with.md).

# Tôi có thể dùng biểu thức chính quy cho "thay thế bằng" không?

Có! Để thực hiện thao tác "Replace" bằng biểu thức chính quy (có trong *Tìm > thay thế* mục menu), bạn có thể chỉ định các trường như sau:

```
Thay thế: /([a-z])-([a-z])/
Bằng: /$1$2/
```

trong đó $1, $2, v.v. là các tham chiếu ngược đến nhóm được bắt thứ nhất, thứ hai.


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