Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh duong » thanh huong, thanh cuong, thanh vuong
thanh dung » thanh tung, thanh hung, hanh dung
hien manh » tien manh, hieu manh, hien nhanh
hien hanh » dieu hanh
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu

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) or (hien hanh)) - thanh trung ((thanh dung) or (thanh duong)) cong tan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hien hanh)) - thanh trung ((thanh dung) OR (thanh duong)) cong tan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) or (hien hanh)) - thanh trung ((thanh dung) or (thanh duong)) cong tan phan cau*.