Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien manh » hien hanh, tien manh, hieu manh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
chinh cau » chinh chau, chinh ca, chinh can
cong dan » cong san, cong tan, huong dan
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 - canh tranh cua nhung cong dan ((can cau) or (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - canh tranh cua nhung cong dan ((can cau) OR (chinh cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - canh tranh cua nhung cong dan ((can cau) or (chinh cau))*.