Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dung dat » dung va, dung tai
cham xuc » cam xuc, chat xuc, cham soc
dat cua » dai cua, day cua, mat cua
va dung » van dung, va duong, vat dung
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, ma hoa, me hoi
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: ((te sach) OR (toc sach)) ty nang ((ma hoi) or (xa hoi)). hieu vu cham xuc va dung dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang ((ma hoi) OR (xa hoi)). hieu vu cham xuc va dung dat cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty nang ((ma hoi) or (xa hoi)). hieu vu cham xuc va dung dat cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty nang ((ma hoi) or (xa hoi)). hieu vu cham xuc va dung dat cua tre*.