Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
khoai chau » khoa chau, khoa phau, hai chau
trinh luan » trinh luat, trinh quan, trinh han
mai chau » lai chau, moc chau, a chau
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((khoai chau) or (mai chau)) tinh - canh trinh luan han cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((khoai chau) OR (mai chau)) tinh - canh trinh luan han cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ((khoai chau) or (mai chau)) tinh - canh trinh luan han cong tan tran cau*.