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
chan cau » phan cau, can cau, nhanh cau

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - canh tranh cua nhung cong dan ((chan cau) OR (chinh cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - canh tranh cua nhung cong dan ((chan cau) OR (chinh cau))*.