Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
cham xuc » cam xuc, chat xuc, cham soc
va cham » va chat, va tham
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
banh d » anh d
o hoi » co hoi, o hoc, o hai
binh » dinh, minh, kinh

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) OR (doc sach)) ky nang o hoi. lieu va cham xuc ban ((banh d) or (binh d)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky nang o hoi. lieu va cham xuc ban ((banh d) OR (binh d)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) ky nang o hoi. lieu va cham xuc ban ((banh d) or (binh d)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) ky nang o hoi. lieu va cham xuc ban ((banh d) or (binh d)) cua tre*.