Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
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: ((doi chieu) or (doc hieu)) tach - anh tang cua thong ((cong ban) OR (cong san)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) tach - anh tang cua thong ((cong ban) OR (cong san)) than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doc hieu)) tach - anh tang cua thong ((cong ban) OR (cong san)) than cap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doc hieu)) tach - anh tang cua thong ((cong ban) OR (cong san)) than cap*.