Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
tranh tuan » tran tuan, tranh luan, thanh tuan
tuan dang » tran dang, tuan bang, tuan dung
thanh cac » hanh cac, thanh bac, thanh ca
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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)) - canh tranh tuan dang ((cong dan) or (cong tan)) thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - canh tranh tuan dang ((cong dan) OR (cong tan)) thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - canh tranh tuan dang ((cong dan) or (cong tan)) thanh cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - canh tranh tuan dang ((cong dan) or (cong tan)) thanh cac*.