Perhaps you should try some spelling variations:
thanh luc » thanh luu, than luc, nhan luc
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 xa hoi. ((hieu van) or (thi van)) thanh luc ((va hanh) or (van hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. ((hieu van) OR (thi van)) thanh luc ((va hanh) OR (van hanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. ((hieu van) or (thi van)) thanh luc ((va hanh) or (van hanh)) vai cua tre*.