Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cong lang » cong vang, cong luong, cong quang
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
cong van » cong vang, cong san, song van
van hau » van ha, van hai, van dau

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 lang - hanh tranh va nhung ((cong van) or (cong lang)) van hau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - hanh tranh va nhung ((cong van) OR (cong lang)) van hau.
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - hanh tranh va nhung ((cong van) or (cong lang)) van hau*.