Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
doan tuan » doan quan, doan quang, hoang tuan
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham 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 ((doan tuan) OR (doanh luan)) nhung cong ((tac toan) or (tam toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((doan tuan) OR (doanh luan)) nhung cong ((tac toan) OR (tam toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((doan tuan) OR (doanh luan)) nhung cong ((tac toan) or (tam toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((doan tuan) OR (doanh luan)) nhung cong ((tac toan) or (tam toan)) ban*.