Perhaps you should try some spelling variations:
hieu tinh » chieu tinh, lieu tinh, kieu tinh
cua tuong » cua truong, cua thuong, cua huong
doc hieu » toc thieu, hoc thieu, hoc hien
cong cua » cong cu, dong cua, huong cua
dong dan » dong danh, duong dan, dong san
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - thanh cong cua tuong ((dong dan) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - thanh cong cua tuong ((dong dan) OR (cong san)) than cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh cong cua tuong ((dong dan) or (cong san)) than cau*.