Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thanh dong » thanh duong, thanh cong, hanh dong
dong trong » duong trong, dung trong, cong trong
trong tac » trong cac, tuong tac, trong tan
dong cua » dung cua, cong cua, huong cua
cua dong » chua dong, cua cong, cua dang
tac toan » tap toan, tam toan, hach toan
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: doi ((chieu sach) or (chiet tach)) - thanh dong cua dong trong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - thanh dong cua dong trong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chiet tach)) - thanh dong cua dong trong tac toan ban*.