Perhaps you should try some spelling variations:
sach van » sach han, bach van, cach van
thuc dan » thuc hanh, hoc dan, thuc vat
hanh de » hanh ve, hanh kem
thuc va » thuc vat, thuc day
hieu ve » hieu va, hieu van
sach va » sach xa, sach ha, sach dao
cuu tre » cua tre, cau tren, cau treo
ve nam » he nam, va nam, le nam
de cuu » de cua

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: so ((sach van) OR (sach va)) nang x ho. hieu ve nam ((thuc va) OR (thuc dan)) hanh de cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach van) OR (sach va)) nang x ho. hieu ve nam ((thuc va) or (thuc dan)) hanh de cuu tre~".
• Adding a wildcard symbol may retrieve word variants: so ((sach van) OR (sach va)) nang x ho. hieu ve nam ((thuc va) or (thuc dan)) hanh de cuu tre*.