Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
thanh va » thanh van, hanh va, thanh ha
xuc ban » duc ban, cuc ban, quoc ban
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
bo sach » co sach, hoc sach
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
va cua » va chua, via cua, ca cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (bo sach)) ky nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc ban thanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (bo sach)) ky nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc ban thanh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (bo sach)) ky nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc ban thanh va cua tre*.