Perhaps you should try some spelling variations:
thanh trung » thanh tung
tuan duong » tuyen duong, tuong duong, van duong
hien manh » hien hanh, tien manh, hieu manh
tan dung » tran dung, tin dung, van dung
cong tac » cong ty
tran cau » tran chau, toan cau, tra cau
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - thanh trung ((tuan duong) or (tan dung)) cong tac ((tran cau) OR (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - thanh trung ((tuan duong) OR (tan dung)) cong tac ((tran cau) OR (ran cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - thanh trung ((tuan duong) or (tan dung)) cong tac ((tran cau) OR (ran cau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - thanh trung ((tuan duong) or (tan dung)) cong tac ((tran cau) OR (ran cau))*.