Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
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: ((te sach) OR (toc sach)) v nang xa hoi. hieu van chat xuc va dan vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) v nang xa hoi. hieu van chat xuc va dan vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) v nang xa hoi. hieu van chat xuc va dan vi cua tre*.