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
chinh cau » chinh chau, chinh ca, chinh can
manh cua » doanh cua, ban cua
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - canh ((tranh cua) OR (manh cua)) nhung cong dan ((can cau) OR (chinh cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - canh ((tranh cua) OR (manh cua)) nhung cong dan ((can cau) or (chinh cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - canh ((tranh cua) OR (manh cua)) nhung cong dan ((can cau) or (chinh cau))*.