Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh dung » thanh duong, thanh tung, thanh hung
phong cong » phong chong, thong cong, chong cong
cac phong » cac phuong, cac chuong, chau phong
dung cac » luong cac, dung cho, dung tai
cong dan » cong san, cong tan, huong dan
chat cao » chat cho, chat bao, chat cam
chat co » thuat co, chat cua, chat deo

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu sang)) - thanh dung cac phong cong dan ((chat cao) OR (chat co))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - thanh dung cac phong cong dan ((chat cao) OR (chat co)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - thanh dung cac phong cong dan ((chat cao) OR (chat co))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - thanh dung cac phong cong dan ((chat cao) OR (chat co))*.