Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
ban hanh » ban hang
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xuc ban » duc ban, cuc ban, quoc ban
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
ve cua » le cua, de cua, te cua
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (toc sach)) ty nang o hoi. hieu ve cham xuc ban hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (toc sach)) ty nang o hoi. hieu ve cham xuc ban hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (toc sach)) ty nang o hoi. hieu ve cham xuc ban hanh ve cua tre*.