Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien manh » hien hanh, tien manh, hien nhanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang cong » dang cong, hang nong, bang cong
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
va hang » van hang, va nang, va lang

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 (hieu manh)) - thanh trung va hang cong dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (hieu manh)) - thanh trung va hang cong dan than cao*".