Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien manh » hien hanh, hieu manh, hien nhanh
tien manh » tien anh, tien thanh, tieng anh
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 (tien manh)) - thanh trung cua dung cong ((dan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (tien manh)) - thanh trung cua dung cong ((dan toan) OR (dan than)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) or (tien manh)) - thanh trung cua dung cong ((dan toan) or (dan than)) tap*.