Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tham xuc » tham nuoc, tham thuc, pham duc
van hanh » van thanh, ban hanh, van anh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
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) or (dac sac)) ky lang xa hoi. hieu va tham xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (dac sac)) ky lang xa hoi. hieu va tham xuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (dac sac)) ky lang xa hoi. hieu va tham xuc van hanh vi cua tre*.