Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
nho hieu » nha hieu, nho sieu, nhu hieu
cong dan » cong san, cong tan, cong dong
can cau » van cau, ban cau, cac cau
ca cau » cua cau, cac cau, ca cac

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

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