Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
hieu lang » chieu sang, hieu quang, nhieu tang
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong
dan chan » dan gian, dan ca
van chat » cao chat
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 lang - canh tranh luan hang cong ((dan chan) or (van chat)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh tranh luan hang cong ((dan chan) OR (van chat)) tap.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tranh luan hang cong ((dan chan) or (van chat)) tap*.