> For the complete documentation index, see [llms.txt](https://doanhnghiepso.portal.io.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doanhnghiepso.portal.io.vn/khoa-hoc/co-ban.md).

# Cơ bản