Perhaps you should try some spelling variations:
ban hang » ngan hang
cham xuc » cam xuc, chat xuc, cham soc
xuc ban » duc ban, cuc ban, quoc ban
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ky sang » ky nang, ky dang, ky tang
va cham » va chat, va tham
ma hoi » mai hoi, ma hoa, me hoi
vi cua » vai cua
di cua » dai cua, doi cua, de 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: tu sach ky sang ((ma hoi) OR (xa hoi)). hieu va cham xuc ban hang ((vi cua) OR (di cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang ((ma hoi) or (xa hoi)). hieu va cham xuc ban hang ((vi cua) OR (di cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ((ma hoi) or (xa hoi)). hieu va cham xuc ban hang ((vi cua) OR (di cua)) triet*.