Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
chat huu » pham huu
chat xuc » cam xuc, chao xu, chat cua
hieu va » lieu va
sach tu » sach thu, cach tu, sach ty
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
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 tu nang xa hoi. ((hieu va) OR (hieu qua)) ((chat xuc) or (chat huu)) van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu nang xa hoi. ((hieu va) OR (hieu qua)) ((chat xuc) OR (chat huu)) van thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu nang xa hoi. ((hieu va) OR (hieu qua)) ((chat xuc) or (chat huu)) van thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach tu nang xa hoi. ((hieu va) OR (hieu qua)) ((chat xuc) or (chat huu)) van thanh vi cua tre*.