Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong san » cong tac
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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 ((trung va) or (trung ha)) dung cong san ((than cao) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((trung va) OR (trung ha)) dung cong san ((than cao) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((trung va) or (trung ha)) dung cong san ((than cao) or (than cap))*.