Perhaps you should try some spelling variations:
kho tang » cao tang
ban hang » ngan hang
ky tang » ky nang, ky dang, ky trong
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham so » cham soc, cham o, ham so
hang vi » hang va, hanh vi, hang di
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ((ky tang) or (kho tang)) ma hoi. hieu ve cham so ban hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ((ky tang) OR (kho tang)) ma hoi. hieu ve cham so ban hang vi cua tre*.