Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
khong cong » thong cong, khong cang, chong cong
tranh hua » tranh chua, tranh cua, tranh ha
hua khong » hoa khong, cua khong, hoac khong
cong hai » cong thai, cong ha, hoang hai
tap cau » tap cac, tao cau, tap can
ta cau » tao cau, tra cau, va cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chiet tach) or (chieu sach)) - canh tranh hua khong cong hai ((tap cau) OR (ta cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (chieu sach)) - canh tranh hua khong cong hai ((tap cau) OR (ta cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chiet tach) or (chieu sach)) - canh tranh hua khong cong hai ((tap cau) OR (ta cau))".
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (chieu sach)) - canh tranh hua khong cong hai ((tap cau) OR (ta cau))*.