Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
trinh cua » tinh cua, trinh luat, trinh luan
ban thanh » ban hanh, ban hang
van toan » van tuan, van tan, van thanh

You may be able to get more results by adjusting your search query.

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