Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
canh trinh » canh tranh, hanh trinh, canh tinh
mot chieu » doi chieu, ho chieu
thanh cau » thanh chau, thanh mau, thanh ca
nhanh cau » nhanh cay, thanh chau, nhanh ha
trinh va » trinh van, trinh vat, trinh ve
va duong » van duong, va tuong, va huong
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo tieu)) xanh - canh trinh va duong cong san ((thanh cau) OR (nhanh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo tieu)) xanh - canh trinh va duong cong san ((thanh cau) OR (nhanh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo tieu)) xanh - canh trinh va duong cong san ((thanh cau) OR (nhanh cau))".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo tieu)) xanh - canh trinh va duong cong san ((thanh cau) OR (nhanh cau))*.