Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
cua triet » cua viet, su triet
hanh lai » hanh lam, hanh tai, thanh lap
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
hieu va » lieu va, hieu qua
hieu ha » hieu hoa, hieu ca, hieu xa
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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: su sac ky nang xa hoi. ((hieu ha) OR (hieu va)) nam thuoc ban hanh lai ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((hieu ha) OR (hieu va)) nam thuoc ban hanh lai ((cua triet) or (va triet))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. ((hieu ha) OR (hieu va)) nam thuoc ban hanh lai ((cua triet) or (va triet))*.