Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
ty hang » ly hang, ty xang, thi hang
van bac » van bao, van hac, dan bac
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: ((toc sach) OR (hoc sach)) ty hang x hoi. hieu ((van bac) OR (van ban)) duc va thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ty hang x hoi. hieu ((van bac) OR (van ban)) duc va thanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ty hang x hoi. hieu ((van bac) OR (van ban)) duc va thanh dai cua tre*.