Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cac thuc » cach thuc, cac thu, can thuc
hanh di » hanh de, hang di, danh di
thuc va » thuc vat, thuc dan, thuc day
qua cac » cua cac
sach 22 » sach 2
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
22 lang » 22 thang
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach 22 lang ((van hoi) OR (van hoe)). hieu qua cac thuc va ((hanh di) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach 22 lang ((van hoi) OR (van hoe)). hieu qua cac thuc va ((hanh di) OR (hanh vi)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach 22 lang ((van hoi) OR (van hoe)). hieu qua cac thuc va ((hanh di) or (hanh vi)) cuu tre*".