Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
trong dang » truong dang, trong dan, trong dong
cong cach » cong cac, cong sach, dong cach
cach dung » sach dung, cach mang, tac dung
dang chan » dan chan, dong chan, dang thanh
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chiet tach)) - thanh cong cach dung trong dang chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh cong cach dung trong dang chan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - thanh cong cach dung trong dang chan cau*.