Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
trong dan » trong dang, trong tan, trong ban
trong san » trong cac, cong san, dong san
tranh va » tranh van, trang va, trinh va
va duong » van duong, va tuong, va huong
toan ban » van ban

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)) - hanh tranh va duong ((trong dan) OR (trong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tranh va duong ((trong dan) OR (trong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - hanh tranh va duong ((trong dan) OR (trong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - hanh tranh va duong ((trong dan) OR (trong san)) toan ban*.