Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
nam thuoc » nam thuc, nam thu, nha thuoc
ban hang » ngan hang
su triet » su tien, ve triet
su sach » so sach, vu sach
tang xa » trang xa, tang ma, lang xa
thi van » thi lan, thi hanh, thi nang
hang vi » hang va, hanh vi, hang di
su viet » so viet
y tang » ky tang, 6 tang, 7 tang

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 y tang xa hoi. thi van nam thuoc ban hang vi ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y tang xa hoi. thi van nam thuoc ban hang vi ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y tang xa hoi. thi van nam thuoc ban hang vi ((su triet) OR (su viet))*.