Perhaps you should try some spelling variations:
mathematical vitality » mathematical reality, mathematical duality, mathematical activity
mathematical utility » mathematical utilities, mathematical activity, mathematical reality
mathematical ability » mathematical activity, mathematical aspects

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: lecture notes of the a ((((mathematical vitality) OR (mathematical utility))) OR (mathematical ability)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "lecture notes of the a ((((mathematical vitality) OR (mathematical utility))) or (mathematical ability))".
• Adding a wildcard symbol may retrieve word variants: lecture notes of the a ((((mathematical vitality) OR (mathematical utility))) or (mathematical ability))*.