Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
vat dao » va dao, van dao, vat da
dao dai » dat dai, dao dan, tao dai
cua tre » cua te, cuu tre, cua triet

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: tu sach ty lang xa hoi. hieu ((cao chat) OR (vo co)) thuc vat dao dai cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang xa hoi. hieu ((cao chat) or (vo co)) thuc vat dao dai cua tre*.