Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
dong thanh » truong thanh
hieu manh » chieu xanh, hieu nganh, hien hanh
trinh cua » tinh cua, trinh luat, trinh quan
hang dong » hang nong, hang cong, hanh dong
cua hang » cua dang, cua nhung, cua cong
san cau » van cau, ban cau, ran cau
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) OR (dieu hanh)) - hanh trinh cua hang dong thanh ((san cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (dieu hanh)) - hanh trinh cua hang dong thanh ((san cau) OR (can cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) OR (dieu hanh)) - hanh trinh cua hang dong thanh ((san cau) or (can cau))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) OR (dieu hanh)) - hanh trinh cua hang dong thanh ((san cau) or (can cau))*.