Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
lam thuoc » nam thuoc, am thuc, cay thuoc
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
te sach » toc sach
ty lang » tay lang, tu lang, tai lang
ty hang » ly hang, thi hang, thu hang
van lam » van nam
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty lang) or (((ty hang) or (ty xang)))) xa hoi. hieu van lam thuoc ban hang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty lang) OR (((ty hang) OR (ty xang)))) xa hoi. hieu van lam thuoc ban hang va cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty lang) or (((ty hang) or (ty xang)))) xa hoi. hieu van lam thuoc ban hang va cua tre*.