Perhaps you should try some spelling variations:
ban hang » ngan hang
te sach » toc sach
hang vi » hang va, hanh vi, hang di
xuc ban » duc ban, cuc ban, quoc ban
van cau » van dau, van hau, van chat
van cam » van nam, van lam, van dam
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, va hoi
vi cua » vai cua, di 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: te sach ky lang ((ha hoi) OR (xa hoi)). hieu ((van cam) OR (van cau)) xuc ban hang vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ((ha hoi) or (xa hoi)). hieu ((van cam) OR (van cau)) xuc ban hang vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ((ha hoi) or (xa hoi)). hieu ((van cam) OR (van cau)) xuc ban hang vi cua tre*.