Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh cac » hanh cac, thanh bac, thanh ca
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cao » toan cao, thai cao, than cap
cong va » dong va, cong ha, cong tac
va dang » van dang, va nang, va lang

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 sach - thanh cong va dang ((cong tan) OR (cong san)) ((than cao) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh cong va dang ((cong tan) OR (cong san)) ((than cao) OR (thanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh cong va dang ((cong tan) OR (cong san)) ((than cao) or (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh cong va dang ((cong tan) OR (cong san)) ((than cao) or (thanh cac))*.