Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
dang xay » dang van, van xay
cham xuc » cam xuc, chat xuc, cham soc
ve cham » va cham, ve chat, vu cham
dinh ve » dinh ket, dinh van
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
xay hoi » xa hoi, tay hoi, cay phoi
xuc va » duc va, tuc va, luc va
o dang » xo dang, do dang, so dang

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 (hoc sach)) o dang xay hoi. hieu ve cham xuc va ((danh vi) OR (dinh ve)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) o dang xay hoi. hieu ve cham xuc va ((danh vi) or (dinh ve)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) o dang xay hoi. hieu ve cham xuc va ((danh vi) or (dinh ve)) cua tre*.