Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
danh dau » lanh dao, hang dau, danh tu
va triet » va trien, ve triet, cua triet
thuoc va » thuc va, thuoc ma, thuong va
danh sai » dung sai, danh bat, hanh san
nang ma » tang ma, sang ma, nang cao
hieu le » hieu ve, hieu he, hieu ly
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
le nam » ly nam, he nam, le na
ma hoi » mai hoi, xa hoi, ma hoa
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang ma hoi. hieu le nam thuoc va ((danh sai) OR (danh dau)) ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ma hoi. hieu le nam thuoc va ((danh sai) OR (danh dau)) ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ma hoi. hieu le nam thuoc va ((danh sai) OR (danh dau)) ((va triet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ma hoi. hieu le nam thuoc va ((danh sai) OR (danh dau)) ((va triet) or (va thiet))*.