Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
danh trung » dang trung, dinh trung, thanh trung
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
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 hieu lang - ((danh trung) or (manh trung)) va hang cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((danh trung) OR (manh trung)) va hang cong dan toan tap*.