> For the complete documentation index, see [llms.txt](https://info.ehs.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://info.ehs.vn/chinh-sach-ban-hang/khoa-hoc/dao-tao-doanh-nghiep/dich-vu-khach-hang.md).

# Dịch vụ khách hàng