Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tuong quan » truong quan, thong quan, luong quan
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
tung qua » dung qua, trung quan, duong qua
dan toan » van toan, dan than, manh toan
van than » van thanh, van thang, 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 - manh ((tung qua) or (tuong quan)) dung cong ((dan toan) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - manh ((tung qua) OR (tuong quan)) dung cong ((dan toan) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - manh ((tung qua) or (tuong quan)) dung cong ((dan toan) or (van than)) cau*.