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

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 x hoi. ((hieu ve) OR (hieu va)) 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 x hoi. ((hieu ve) OR (hieu va)) cham xuc ban hanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (toc sach)) ty nang x hoi. ((hieu ve) OR (hieu va)) cham xuc ban hanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (toc sach)) ty nang x hoi. ((hieu ve) OR (hieu va)) cham xuc ban hanh ve cua tre*.