Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
sach vu » sach va, sach tu, sach uu
va hanh » van hanh, va danh, ban hanh
qua cac » cua cac
qua cam » qua cham, qua ca, qua cai
nang xa » nang x, lang xa, nang ma
vu nang » vuc nang, va nang, vu dang
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 vu nang xa hoi. hieu ((qua cam) OR (qua cac)) xuc ((va thanh) or (va hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach vu nang xa hoi. hieu ((qua cam) OR (qua cac)) xuc ((va thanh) OR (va hanh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach vu nang xa hoi. hieu ((qua cam) OR (qua cac)) xuc ((va thanh) or (va hanh)) vi cua tre*".