Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tranh quan » tranh quang, tranh luan, thanh quan
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
van thanh » ban thanh, van tuan
dan than » dan chan, ban than, van than

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 - canh ((tranh quan) OR (trinh quan)) dung cong ((dan than) OR (van thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh ((tranh quan) OR (trinh quan)) dung cong ((dan than) or (van thanh)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh ((tranh quan) OR (trinh quan)) dung cong ((dan than) or (van thanh)) cau*.