Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
tay quang » tac quang, tai quang, tao quang
sach tay » xach tay, sach hay, sach nay
quang xa » quan xa, quang ma, quang va
nam thuc » nam thuoc, nam tu
ban hanh » ban hang
bo sach » co sach, hoc sach

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: bo sach tay quang xa hoi. lieu va ((nam thu) OR (((nam thuc) OR (am thuc)))) ban hanh vi van triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach tay quang xa hoi. lieu va ((nam thu) or (((nam thuc) OR (am thuc)))) ban hanh vi van triet~".
• Adding a wildcard symbol may retrieve word variants: bo sach tay quang xa hoi. lieu va ((nam thu) or (((nam thuc) OR (am thuc)))) ban hanh vi van triet*.