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, ly nang
kem cua » em cua, keo cua, diem cua
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
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) OR (ty hang)) x hoi. hieu ve cham xuc ban hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (toc sach)) ((ty nang) OR (ty hang)) x hoi. hieu ve cham xuc ban hanh kem cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (toc sach)) ((ty nang) OR (ty hang)) x hoi. hieu ve cham xuc ban hanh kem cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (toc sach)) ((ty nang) OR (ty hang)) x hoi. hieu ve cham xuc ban hanh kem cua tre*.