Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than cap
khan cap » khan ap, than cap, khoan cam
va dang » van dang, va lang, da dang
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 - thanh cong ((va dang) or (va nang)) cong tan ((than cao) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh cong ((va dang) OR (va nang)) cong tan ((than cao) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh cong ((va dang) or (va nang)) cong tan ((than cao) or (khan cap))*.