Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cac toc » cac toi, cac nuoc, cac thoi
toc van » hoc van, toc san, tac van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang x ho. lieu va cac toc van hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x ho. lieu va cac toc van hanh vi cua tre*.