Perhaps you should try some spelling variations:
cham dua » chay dua, cham giua, pham duc
ban hang » ngan hang
hang hoi » hang hoa, hang hai, hang doi
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, lai hoi, mai doi
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
dua ban » dia ban, cua ban, qua ban
hoi cuu » hoi chu, hoi cua, ho cuu
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((mai hoi) or (dai hoi)). hieu ve cham dua ban hang hoi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((mai hoi) OR (dai hoi)). hieu ve cham dua ban hang hoi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((mai hoi) or (dai hoi)). hieu ve cham dua ban hang hoi cuu tre*.