Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van chat » cao chat
hieu van » hieu va, thien van, lieu va
chat xuc » chat huu, cam xuc, chao xu
ky danh » ky anh, ky dang
don vai » don vi, den vai, doi vai
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
don va » doan va, dong va, don vi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky danh) OR (ky nang)) xa hoi. hieu van chat xuc va ((don vai) OR (don va)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky danh) or (ky nang)) xa hoi. hieu van chat xuc va ((don vai) OR (don va)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky danh) or (ky nang)) xa hoi. hieu van chat xuc va ((don vai) OR (don va)) cua tre*.