Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cau thuc » cau truc, cuu thuc, can thuc
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
sach le » cach le, sach de, sach lo
le tang » le quang, le trung, le thanh
tang xa » trang xa, tang ma, lang xa
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
vi cua » vai cua, di cua

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 le tang xa hoi. lieu va cau thuc day hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach le tang xa hoi. lieu va cau thuc day hanh vi cua tre*.