Perhaps you should try some spelling variations:
matthew xiii » matthew xxii, matthew xvi, matthew xxv
matthew xxiv » matthew xxv, matthew xxii, matthew xvi
21 sermons » 2 sermons, 1 sermons, 14 sermons
6 sermons » 2 sermons, 1 sermons
2f early » 20 early, 21 early, ef early
2c 51 » 24 51, c 51, 20 51

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: %22bible %2f n.t %2f ((matthew xiii) OR (matthew xxiv))%2c 51 %((21 sermons) OR (6 sermons)) %2f early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22bible %2f n.t %2f ((matthew xiii) OR (matthew xxiv))%2c 51 %((21 sermons) or (6 sermons)) %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %2f ((matthew xiii) OR (matthew xxiv))%2c 51 %((21 sermons) or (6 sermons)) %2f early works to 1800%22*.