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 dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, 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 dan 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 dan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (hien hanh)) - thanh trung ((thanh dung) or (thanh duong)) cong dan phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) OR (hien hanh)) - thanh trung ((thanh dung) or (thanh duong)) cong dan phan cau*.