Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc ma » hoc ma, duoc ma
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
ma doan » ma dan, tap doan, va doanh
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
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 cac ky lang xa hoi. ((hieu ve) or (hieu va)) nam thuoc ma doan va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky lang xa hoi. ((hieu ve) OR (hieu va)) nam thuoc ma doan va cua tre.
• Adding a wildcard symbol may retrieve word variants: te cac ky lang xa hoi. ((hieu ve) or (hieu va)) nam thuoc ma doan va cua tre*.