Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
huong cua » dung cua
tang luan » dung luan
khao cuu » cham cuu, chao chu, kho cua
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: khao cuu van - hanh ((huong cua) or (tang luan)) nhung cong ban than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: khao cuu van - hanh ((huong cua) OR (tang luan)) nhung cong ban than man.
• Adding a wildcard symbol may retrieve word variants: khao cuu van - hanh ((huong cua) or (tang luan)) nhung cong ban than man*.