Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
hanh mang » nhanh mang, hanh trang, nhanh lang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - ((hanh mang) or (hanh trinh)) ((va hang) or (va nang)) cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((hanh mang) OR (hanh trinh)) ((va hang) OR (va nang)) cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((hanh mang) or (hanh trinh)) ((va hang) or (va nang)) cong dan than cao*.