Perhaps you should try some spelling variations:
thuoc van » thuoc va, thuc van, thuoc ban
lam thuoc » nam thuoc, am thuc, cay thuoc
hieu van » hieu va, thien van, lieu va
van hang » van khang, van hoang, van thang
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 van 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 van hang va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((((ty lang) OR (ty hang))) or (ty xang)) xa hoi. hieu van lam thuoc van hang va cua tre*".