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

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) OR (thuoc sach)) ((ky danh) OR (ky nang)) xa hoi. hieu van chat xuc va don vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ((ky danh) or (ky nang)) xa hoi. hieu van chat xuc va don vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ((ky danh) or (ky nang)) xa hoi. hieu van chat xuc va don vai cua tre*.