Perhaps you should try some spelling variations:
128 bishop » 1748 bishop, 1725 bishop, 11 bishop
2c bishop » 21 bishop, r.c bishop, m.c bishop
25 saint » 5 saint, 2015 saint, 25 saving
15 saint » 18 saint, 5 saint, 10 saint
c bishop » c bishops, a bishop, d bishop

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 %((((((25 saint) OR (15 saint))) OR (((1 saint) OR (_ saint))))) OR (2((1 saint) OR (_ saint))))%((((2c bishop) OR (c bishop))) OR (((_ bishop) OR (128 bishop)))) of smyrna%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22polycarp %((((((25 saint) or (15 saint))) or (((1 saint) or (_ saint))))) or (2((1 saint) or (_ saint))))%((((2c bishop) OR (c bishop))) or (((_ bishop) or (128 bishop)))) of smyrna%22".
• Adding a wildcard symbol may retrieve word variants: %22polycarp %((((((25 saint) or (15 saint))) or (((1 saint) or (_ saint))))) or (2((1 saint) or (_ saint))))%((((2c bishop) OR (c bishop))) or (((_ bishop) or (128 bishop)))) of smyrna%22*.