Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
ban hang » ngan hang
su triet » su viet, su tien
ve triet » va trien
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
thi van » thi lan, thi hanh, thi nang
hang oi » hang doi, hang loi, hang di

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang xa hoi. thi van nam thuoc ban hang oi ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. thi van nam thuoc ban hang oi ((su triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. thi van nam thuoc ban hang oi ((su triet) or (ve triet))*.