Perhaps you should try some spelling variations:
thanh tung » thanh cong
viet tach » viet sach, viet tech, viet thanh
va thong » va thuong, va phuong, he thong
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap
te viet » thi viet, tai viet
tung va » trung va, tuong va, dung va
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te viet tach - thanh tung va thong ((cong san) OR (cong tac)) ((can cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te viet tach - thanh tung va thong ((cong san) OR (cong tac)) ((can cau) OR (toan cau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te viet tach - thanh tung va thong ((cong san) OR (cong tac)) ((can cau) or (toan cau))*".