Perhaps you should try some spelling variations:
tranh van » tran van, trinh van, thanh van
nang cong » nang song, dang cong, bang cong
van nang » van quang, van ban, van dong
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tuan, trang tai
tran tan » tran tuan, tran van, tran thanh
o chau » a chau, moc chau
3 chau » a chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((o chau) or (3 chau)) tinh - canh tranh van nang cong tan ((tran tap) OR (tran tan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((o chau) OR (3 chau)) tinh - canh tranh van nang cong tan ((tran tap) OR (tran tan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((o chau) or (3 chau)) tinh - canh tranh van nang cong tan ((tran tap) OR (tran tan))".
• Adding a wildcard symbol may retrieve word variants: ((o chau) or (3 chau)) tinh - canh tranh van nang cong tan ((tran tap) OR (tran tan))*.