Perhaps you should try some spelling variations:
kho tang » cao tang
ban hanh » ban hang
cac kho » cac khoi, cac khoa, cac khu
cham so » cham soc, cham o, ham so
va cham » va chat, va tham
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, me hoi, va hoi
so ban » sao ban, so bang, co ban
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: tu cac kho tang ((((ma hoi) OR (ma hoa))) OR (mai hoi)). hieu va cham so ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac kho tang ((((ma hoi) OR (ma hoa))) or (mai hoi)). hieu va cham so ban hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac kho tang ((((ma hoi) OR (ma hoa))) or (mai hoi)). hieu va cham so ban hanh vi cua tre*.