Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
chat xuc » chat huu, cam xuc, chao xu
don vai » don va, den vai, doi vai
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ((ky dang) or (ky nang)) xay hoi. hieu ve chat xuc va ((don vai) or (don vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky dang) OR (ky nang)) xay hoi. hieu ve chat xuc va ((don vai) OR (don vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky dang) or (ky nang)) xay hoi. hieu ve chat xuc va ((don vai) or (don vi)) cua tre*.