Perhaps you should try some spelling variations:
matthew xxviii » matthew xiii, matthew xxv, matthew vii
matthew xxii » matthew xxv, matthew xvi
21 sermons » 1 sermons, 6 sermons, 14 sermons
2f early » 21 early, ef early, f early
20 early » 10 early, 1820 early, 1720 early
2c 51 » 24 51, c 51, 21 51
20 51 » 290 51, 20 21, 24 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 xxviii) OR (matthew xxii))%((2c 51) OR (20 51)) %((21 sermons) OR (2 sermons)) %((2f early) OR (20 early)) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22bible %2f n.t %2f ((matthew xxviii) or (matthew xxii))%((2c 51) or (20 51)) %((21 sermons) or (2 sermons)) %((2f early) OR (20 early)) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %2f ((matthew xxviii) or (matthew xxii))%((2c 51) or (20 51)) %((21 sermons) or (2 sermons)) %((2f early) OR (20 early)) works to 1800%22*.