> For the complete documentation index, see [llms.txt](https://app.langso.io.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://app.langso.io.vn/mang-luoi-lang-he-sinh-thai/lang-so-he-sinh-thai-xa-hoi/untitled.md).

# Untitled