Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
va thanh » gia thanh, ban thanh, le thanh
chat xuc » chat huu, cam xuc, chao xu
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
ky dang » ky danh
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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: doc sach ((ky dang) OR (ky nang)) xay hoi. hieu ve chat xuc ((va thanh) OR (va tinh)) va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((ky dang) or (ky nang)) xay hoi. hieu ve chat xuc ((va thanh) OR (va tinh)) va cua tre~".
• Adding a wildcard symbol may retrieve word variants: doc sach ((ky dang) or (ky nang)) xay hoi. hieu ve chat xuc ((va thanh) OR (va tinh)) va cua tre*.