Perhaps you should try some spelling variations:
khoai chau » khoa chau, khoa phau, hai chau
canh tinh » hanh tinh, manh tinh, canh tranh
tinh luan » trinh luan, binh luan, minh luan
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong
mai chau » lai chau, moc chau, a chau
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 tinh luan hang cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((khoai chau) OR (mai chau)) tinh - canh tinh luan hang cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ((khoai chau) or (mai chau)) tinh - canh tinh luan hang cong tan tran cau*.