Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
vu dinh » quy dinh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
ty hang » ly hang, thi hang, thu hang
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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 ((ty xang) or (ty hang)) xa hoi. hieu ve cac xuc ((vu dinh) or (va tinh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty xang) OR (ty hang)) xa hoi. hieu ve cac xuc ((vu dinh) OR (va tinh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty xang) or (ty hang)) xa hoi. hieu ve cac xuc ((vu dinh) or (va tinh)) vai cua tre*.