Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh chao » trinh chat, trinh han, trinh giao
cang thang » cong thanh, dang thanh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
dang toan » dang tran, dan toan, dung toan
trinh co » trinh do, trinh cong, trinh hoa

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 - hanh ((trinh chao) OR (trinh co)) dung cong ((dang toan) or (cang thang)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh chao) OR (trinh co)) dung cong ((dang toan) OR (cang thang)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((trinh chao) OR (trinh co)) dung cong ((dang toan) or (cang thang)) ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh chao) OR (trinh co)) dung cong ((dang toan) or (cang thang)) ban*.