Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong dan » cong san, cong tan, huong dan
toan tai » doanh tai, toan cao, von tai
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu qua - hanh tran van nhung cong dan ((toan tai) or (((toan tap) or (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu qua - hanh tran van nhung cong dan ((toan tai) OR (((toan tap) OR (toan ban)))).
• Adding a wildcard symbol may retrieve word variants: ho hieu qua - hanh tran van nhung cong dan ((toan tai) or (((toan tap) or (toan ban))))*.