Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
lam thuoc » nam thuoc, am thuc, cay thuoc
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
nang xa » nang x, lang xa, nang ma
van lam » van nam
va tinh » may tinh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet

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 lo nang xa hoi. hieu van lam thuoc ((va tinh) or (ban thanh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo nang xa hoi. hieu van lam thuoc ((va tinh) OR (ban thanh)) tai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach lo nang xa hoi. hieu van lam thuoc ((va tinh) or (ban thanh)) tai cua tre*.