Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
luan lang » luan nang, quan lang, lan lang
cong vang » cong lang, cong quang, cong ngang
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
cong van » cong san, song van, cong tan
chat ta » chat tai, chat va, chan ta

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (theo chu)) sang - canh tranh luan lang ((cong van) or (cong vang)) chat ta~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chu)) sang - canh tranh luan lang ((cong van) OR (cong vang)) chat ta.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chu)) sang - canh tranh luan lang ((cong van) or (cong vang)) chat ta*.