Perhaps you should try some spelling variations:
sang tao » hang tai
cua viet » ca viet, hoa viet, cua vat
ky sang » ky nang, ky dang, ky tang
hieu le » hieu ve, hieu he, hieu ly
na thuc » nam thuc, na thuoc, va thuc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
hoi cua » hoi chuc
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
le na » le nam, le va, le ta

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky sang tao boi. hieu le na thuc ((va hanh) OR (va danh)) hoi cua viet~.
• Adding a wildcard symbol may retrieve word variants: su sac ky sang tao boi. hieu le na thuc ((va hanh) or (va danh)) hoi cua viet*.