Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cac thuc » cach thuc, cac thu, can thuc
dang xay » dang van, van xay
tu sach » su sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
dao vai » dao van, dao va, dao bai
thuc va » thuc vat, thuc dan, thuc day
qua cac » cua cac
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
va dao » ca dao

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

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