> For the complete documentation index, see [llms.txt](https://help.bluecore.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.bluecore.vn/english/flows/cac-activity/thong-dung.md).

# Thông dụng

- [Sending a SMS message](https://help.bluecore.vn/english/flows/cac-activity/thong-dung/sending-a-sms-message.md): Send a message to a phone number
- [Create coupon](https://help.bluecore.vn/english/flows/cac-activity/thong-dung/create-coupon.md)