Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh hong » thanh huong, thanh hoang, thanh cong
doi chieu » doc hieu, doi chi, mot chieu
cong tang » cong thang, cong tan, cong vang
cong lang » cong vang, cong luong, cong quang
thanh lap » thanh san, phan lap, thanh hai
tuc dung » thuc dung, duc dung, thuoc dung
tac dung » sach dung, xay dung, tin dung

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 - thanh hong ((tuc dung) OR (tac dung)) ((cong tang) OR (cong lang)) thanh lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh hong ((tuc dung) OR (tac dung)) ((cong tang) or (cong lang)) thanh lap~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh hong ((tuc dung) OR (tac dung)) ((cong tang) or (cong lang)) thanh lap*.