Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh cung » thanh cuong, thanh cong, thanh tung
doi chieu » doc hieu, doi chi, ho chieu
hang cong » dang cong, hang nong, bang cong
cung cap » trung cap
cap hang » cap hoang, cap bang, cap han
tac toan » tap toan, tam toan, hach toan

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 - thanh cung cap hang cong ((tac toan) or (((bai toan) or (bai tap)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh cung cap hang cong ((tac toan) OR (((bai toan) OR (bai tap)))) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh cung cap hang cong ((tac toan) or (((bai toan) or (bai tap)))) cau*.