Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
dong thanh » truong thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh luan
hang dong » hang nong, hang cong, hanh dong
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu manh - hanh ((trinh cua) or (trinh quan)) hang dong thanh ((can cau) OR (ca cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh ((trinh cua) OR (trinh quan)) hang dong thanh ((can cau) OR (ca cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - hanh ((trinh cua) or (trinh quan)) hang dong thanh ((can cau) OR (ca cau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh ((trinh cua) or (trinh quan)) hang dong thanh ((can cau) OR (ca cau))*.