Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thanh lay » thanh lap, thanh tay, thanh lam
cua viet » ca viet, hoa viet, cua vat
dua tren » dung tren
thuoc va » thuc va, thuoc ma, thuong va
va thanh » gia thanh, ban thanh, va tinh
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang noi
cua tre » cua te, cuu tre, cua triet
bach ky » bac ky
ve nam » he nam, va nam, le nam
co hoi » co hoc, co loi

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: vu bach ky nang co hoi. hieu ve nam thuoc va thanh lay ((((cua tre) OR (dua tren))) OR (cua viet))~.
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang co hoi. hieu ve nam thuoc va thanh lay ((((cua tre) or (dua tren))) or (cua viet))*.