Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
hien sang » hien trang, chieu sang, thien bang
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
cong dan » cong san, cong tan, huong dan
cac cau » cac mau, bac cau, cac cam
ca cau » cua cau, can 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: hoc ((hien sang) or (khien bang)) - canh tranh cua cong cong dan ((ca cau) OR (cac cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (khien bang)) - canh tranh cua cong cong dan ((ca cau) OR (cac cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) or (khien bang)) - canh tranh cua cong cong dan ((ca cau) OR (cac cau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) or (khien bang)) - canh tranh cua cong cong dan ((ca cau) OR (cac cau))*.