Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
ban thanh » ban hanh, ban hang
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
cua tre » cuu tre, cua triet, dua tren
sac ky » cac ky, sai ky
cua te » cua tu
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu van ((am thuc) or (nam thuoc)) ban thanh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu van ((am thuc) OR (nam thuoc)) ban thanh doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu van ((am thuc) or (nam thuoc)) ban thanh doi ((cua tre) or (cua te))*.