Perhaps you should try some spelling variations:
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, quoc ban
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
vai va » mai va, dai va, hai va
bi va » bo va
thiet » thieu

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 ty nang cao hoi. hieu ((ve cham) or (vu cham)) xuc ban hang ((bi va) or (vai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cao hoi. hieu ((ve cham) OR (vu cham)) xuc ban hang ((bi va) OR (vai va)) thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang cao hoi. hieu ((ve cham) or (vu cham)) xuc ban hang ((bi va) or (vai va)) thiet*.