Perhaps you should try some spelling variations:
ban hang » ngan hang
thuc ban » thuoc ban, thuc dan, thu ban
can thuc » dan thuc, van thuc, cay thuc
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ve luu » ke luu, vi luu
va can » va chan, va cac, va cao
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((o hoi) OR (o hai)). lieu va can thuc ban hang ((ve luu) OR (ke suu)) tre~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((o hoi) or (o hai)). lieu va can thuc ban hang ((ve luu) or (ke suu)) tre*.