Perhaps you should try some spelling variations:
21 bishop » 11 bishop, 128 bishop, _ bishop
2c bishop » r.c bishop, 128 bishop, m.c bishop
2f saint » 21 saint, a saint, du saint
25 saint » 5 saint, 15 saint, 2015 saint
2_ saint » 21 saint, a saint, du saint
c bishop » c bishops, _ bishop, a bishop
2 saint » 2 saints, 1 saint, 5 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 %((((((((2f saint) OR (de saint))) OR (((2 saint) OR (_ saint))))) OR (25 saint))) OR (2_ saint))%((((2c bishop) OR (21 bishop))) OR (c bishop)) of smyrna%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22polycarp %((((((((2f saint) or (de saint))) or (((2 saint) or (_ saint))))) or (25 saint))) or (2_ saint))%((((2c bishop) OR (21 bishop))) or (c bishop)) of smyrna%22".
• Adding a wildcard symbol may retrieve word variants: %22polycarp %((((((((2f saint) or (de saint))) or (((2 saint) or (_ saint))))) or (25 saint))) or (2_ saint))%((((2c bishop) OR (21 bishop))) or (c bishop)) of smyrna%22*.