Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
moi hieu » moi dieu, hoi hieu, doi chieu
vat hang » van hang, dat hang, va hang
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
canh cau » canh chau, can cau, danh cau
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho hieu) or (moi hieu)) lang - canh trinh vat hang ((cong dan) OR (cong tan)) canh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (moi hieu)) lang - canh trinh vat hang ((cong dan) OR (cong tan)) canh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) or (moi hieu)) lang - canh trinh vat hang ((cong dan) OR (cong tan)) canh cau".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) or (moi hieu)) lang - canh trinh vat hang ((cong dan) OR (cong tan)) canh cau*.