Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
chua nang » chuc nang, chua xang, kha nang
toc hieu » toc thieu, doc hieu, hoc thieu
chu bang » thu bang, chuc nang, chu quang
doan van » doan va, hoang van, luan van
dan van » dang van, dao van, tan van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - thanh trung ((chua nang) or (chu bang)) cong ((dan van) OR (doan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - thanh trung ((chua nang) OR (chu bang)) cong ((dan van) OR (doan van)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu manh - thanh trung ((chua nang) or (chu bang)) cong ((dan van) OR (doan van)) ban*".