Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
hieu van » hieu va, thien van, lieu va
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
van lam » van nam
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
ty dang » ty xang, ky dang, ty hang
cua tre » cua te, cuu tre, cua triet
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao

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: te sach ty dang ((xay hoi) OR (tay hoi)). hieu van lam thuoc ((va dan) OR (ca dan)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty dang ((xay hoi) OR (tay hoi)). hieu van lam thuoc ((va dan) or (ca dan)) vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty dang ((xay hoi) OR (tay hoi)). hieu van lam thuoc ((va dan) or (ca dan)) vai cua tre*.