Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh van » trinh han, trinh quan, trinh toan
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
van nang » van quang, van ban, van dong
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh trinh van nang ((cong manh) OR (cong danh)) ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh trinh van nang ((cong manh) or (cong danh)) ((toan tap) or (toan ban))*.