Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien thanh » tien thanh, thi thanh, hien hanh
tien anh » tieng anh, tien manh, dien anh
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: hoc ((thien thanh) or (tien anh)) - thanh trung ((va ung) or (van dung)) cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (tien anh)) - thanh trung ((va ung) OR (van dung)) cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (tien anh)) - thanh trung ((va ung) or (van dung)) cong tan toan cao*.