Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
co hai » co dai, co hoi, o hai
va cam » va cham, va cac, va cao
va am » va lam

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 ky nang co hai. lieu ((va am) OR (va cam)) ((thuc va) OR (thuc day)) vanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang co hai. lieu ((va am) OR (va cam)) ((thuc va) or (thuc day)) vanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang co hai. lieu ((va am) OR (va cam)) ((thuc va) or (thuc day)) vanh dai cua tre*.