Perhaps you should try some spelling variations:
kho tang » cao tang
ban hang » ngan hang
hang dai » hoang dai, hang tai, hang dau
sac kho » suc khoe, cac khoi, dac khoa
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac kho tang ((ma hoi) or (mai hoi)). hieu ve cam duc ban hang dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac kho tang ((ma hoi) OR (mai hoi)). hieu ve cam duc ban hang dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac kho tang ((ma hoi) or (mai hoi)). hieu ve cam duc ban hang dai cua tre*.