Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
vat dao » va dao, van dao, vat da
cua tre » cua te, cuu tre, cua triet
qua am » quan am, qua ap, cua am
dao va » dao van, tao va, do va
va cua » va chua, via cua, ca cua
thuc » thu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((lang xa) or (dang xay)) hoi. hieu qua am thuc vat dao va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (dang xay)) hoi. hieu qua am thuc vat dao va cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) or (dang xay)) hoi. hieu qua am thuc vat dao va cua tre*.