Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va triet » va trien, ve triet, cua triet
danh sai » dung sai, danh bat, danh dau
thuoc va » thuc va, thuoc ma, thuong va
su sach » vu sach
va danh » va dinh, va dan, va hanh
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu le » hieu ve, hieu he, hieu ly
le nam » ly nam, he nam, le na
v nang » va nang, vu nang, van nang
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 sach) or (so sach)) v nang xa hoi. hieu le nam thuoc va danh sai ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) v nang xa hoi. hieu le nam thuoc va danh sai ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) v nang xa hoi. hieu le nam thuoc va danh sai ((va triet) or (va thiet))*.