Perhaps you should try some spelling variations:
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hang le » hoang le, tang le, hang ly
xuc ban » duc ban, cuc ban, quoc ban
ve cham » ve chat, vu cham, ve chim
sach ky » sac ky, sach y, sach ty
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
le cua » ly cua
cua te » cua tu

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 hoi) OR (dai hoi)). hieu ((ve cham) or (va cham)) xuc ban hang le cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mai hoi) OR (dai hoi)). hieu ((ve cham) OR (va cham)) xuc ban hang le cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((mai hoi) OR (dai hoi)). hieu ((ve cham) or (va cham)) xuc ban hang le cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mai hoi) OR (dai hoi)). hieu ((ve cham) or (va cham)) xuc ban hang le cua te*.