Perhaps you should try some spelling variations:
ban nhanh » ban hanh, ban thanh, ban nhan
cham thuc » nham thuc, pham thuc, tham thuc
thuc ban » thuoc ban, thuc dan, thu ban
nhanh ha » thanh hoa, thanh hai, khanh hoa
su triet » su viet, su tien, ve triet
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
so sac » so sach, so dac
sac ky » cac ky, sai ky
ha su » hay su, hoa su, nha su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky ((nang ma) OR (sang ma)) hoi. hieu ve cham thuc ban nhanh ha su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky ((nang ma) OR (sang ma)) hoi. hieu ve cham thuc ban nhanh ha su triet".
• Adding a wildcard symbol may retrieve word variants: so sac ky ((nang ma) OR (sang ma)) hoi. hieu ve cham thuc ban nhanh ha su triet*.