Perhaps you should try some spelling variations:
hang hoi » hang hoa, hang hai, hang doi
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
ve chat » va chat, van chat
hoi cuu » hoi chu, hoi cua, ho cuu
dua ban » dia ban, cua ban, qua ban
ve cham » va cham, vu cham, ve chim
sach ky » sac ky, sach y, sach ty
dai hoi » dai hoc, dai hai, dai moi
mai doi » moi doi, mai hoi, mai khoi
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: tu sach ky nang ((mai doi) or (dai hoi)). hieu ((ve cham) OR (ve chat)) dua ban hang hoi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mai doi) OR (dai hoi)). hieu ((ve cham) OR (ve chat)) dua ban hang hoi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((mai doi) or (dai hoi)). hieu ((ve cham) OR (ve chat)) dua ban hang hoi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mai doi) or (dai hoi)). hieu ((ve cham) OR (ve chat)) dua ban hang hoi cuu tre*.