Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
ban toan » ban than, van toan, bao toan
bai toan » bai tap

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 - canh tranh cua dung cong ((ban toan) OR (bai toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh tranh cua dung cong ((ban toan) OR (bai toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh cua dung cong ((ban toan) OR (bai toan)) ban*.