Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien manh » hien hanh, tien manh, hieu manh
trinh cua » tinh cua, trinh luat, trinh quan
hang dong » hang nong, hanh dong, lang dong
hang cong » dang cong, hang nong, bang 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: hoc hien manh - hanh trinh cua ((hang dong) or (hang cong)) thanh ((san cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - hanh trinh cua ((hang dong) OR (hang cong)) thanh ((san cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - hanh trinh cua ((hang dong) or (hang cong)) thanh ((san cau) or (can cau))*.