Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung hang » nhung lang, nhung bang, nhung cang
hieu quan » hieu qua, lieu quan, thien quan
hanh tran » hanh trang, hanh tram, thanh trang
hang luan » tang luan, dung luan
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 quan - ((hanh tran) or (thanh tran)) tuan nhung hang luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - ((hanh tran) OR (thanh tran)) tuan nhung hang luan van ban*.