Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
hieu quang » thieu quang, hieu quan, hieu qua
huong ban » huong dan, huong ben, huong lan
hoc hieu » hoc thieu, hoc hien, doc hieu
trang va » hang va
tran van » luan van
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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 quang - thanh ((trang va) or (tran van)) nhung huong ban than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu quang - thanh ((trang va) OR (tran van)) nhung huong ban than cap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu quang - thanh ((trang va) or (tran van)) nhung huong ban than cap*.