Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
qua trong » quan trong, qua trinh, qua song
cua trung » cua truong, xuan trung, cua nhung
manh toan » thanh toan, anh tuan, tinh toan
anh tang » anh bang, anh dang, anh nang
van tai » von tai, van tuan

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 - anh tang ((qua trong) or (cua trung)) cong ((manh toan) or (van tai)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - anh tang ((qua trong) OR (cua trung)) cong ((manh toan) OR (van tai)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - anh tang ((qua trong) or (cua trung)) cong ((manh toan) or (van tai)) cau*.