Perhaps you should try some spelling variations:
tranh viet » tran viet, trinh viet, trang viet
hieu lang » chieu sang, hieu quang, nhieu tang
viet hung » viet huong, viet trung
cong danh » cuong danh, cong thanh, cong khanh
toc hieu » toc thieu, doc hieu, hoc thieu
cong dan » cong san, cong tan, huong dan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - canh tranh viet hung ((cong dan) or (cong danh)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - canh tranh viet hung ((cong dan) OR (cong danh)) phan lap*.