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 » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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) OR (toan 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) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu tinh - thanh cong cua tuong ((dong dan) or (cong san)) ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh cong cua tuong ((dong dan) or (cong san)) ((than cau) OR (toan cau))*.