Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
su triet » su viet, su tien, ve triet
ban hang » ngan hang
nam thuc » am thuc, nam thu, nam tu
sach ky » sac ky, sach y, sach ty
hang oi » hang doi, hang loi, hang di
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
thi van » thi lan, thi hanh, thi nang
oi su » ki su, vi su

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 ky ((nang xa) OR (nang ma)) hoi. thi van ((nam thuc) or (nam thuoc)) ban hang oi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang ma)) hoi. thi van ((nam thuc) OR (nam thuoc)) ban hang oi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang ma)) hoi. thi van ((nam thuc) or (nam thuoc)) ban hang oi su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang ma)) hoi. thi van ((nam thuc) or (nam thuoc)) ban hang oi su triet*.