Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
sach thi » sach tai, sach thieu, sach tham
sach thu » sach thue, sach thieu, sach tham
van chat » cao chat
va thanh » gia thanh, ban thanh, va tinh
van cau » van dau, van hau, toan cau
cua tre » cua te, cuu tre, cua triet
hang x » nang x, hoang xa, chang xu
x hoi » xa hoi, o hoi, x ho

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: te ((sach thi) OR (sach thu)) hang x hoi. hieu ((van cau) OR (van chat)) duc va thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thi) OR (sach thu)) hang x hoi. hieu ((van cau) or (van chat)) duc va thanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach thi) OR (sach thu)) hang x hoi. hieu ((van cau) or (van chat)) duc va thanh dai cua tre*.