Perhaps you should try some spelling variations:
21 bishop » 11 bishop, 128 bishop, _ bishop
15 saint » 18 saint, 10 saint, 14 saint
21 saint » 2 saint, 25 saint, 2013 saint
5 saint » 5 saints, _ saint, a saint
1 saint » _ saint, a saint

Try widening your search to All Fields.

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: %22polycarp %((((((2((5 saint) OR (15 saint))) OR (((5 saint) OR (15 saint))))) OR (1 saint))) OR (((21 saint) OR (201((5 saint) OR (15 saint))))))%21 bishop of smyrna%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22polycarp %((((((2((5 saint) OR (15 saint))) or (((5 saint) OR (15 saint))))) or (1 saint))) or (((21 saint) or (201((5 saint) OR (15 saint))))))%21 bishop of smyrna%22".
• Adding a wildcard symbol may retrieve word variants: %22polycarp %((((((2((5 saint) OR (15 saint))) or (((5 saint) OR (15 saint))))) or (1 saint))) or (((21 saint) or (201((5 saint) OR (15 saint))))))%21 bishop of smyrna%22*.