> For the complete documentation index, see [llms.txt](https://docs.sandbox.com.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sandbox.com.vn/thu-vien-cau-hoi/1.-tai-sao-len-don-o-man-thu-ngan-khong-ap-dung-duoc-khuyen-mai.md).

# 1. Tại sao lên đơn ở màn Thu ngân không áp dụng được Khuyến mãi?

Có thể do các nguyên nhân sau:\
\- Khuyến mãi đã hết thời gian áp dụng\
\- Khuyến mãi không áp dụng cho sản phẩm trong đơn hàng\
\- Khuyến mãi đã quá số lần được áp dụng đối với khách hàng\
\- Chưa tạo khách hàng\
\- Khách hàng chưa có nhóm hoặc hạng khách hàng\
...


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