Perhaps you should try some spelling variations:
matthew xxviii » matthew xiii, matthew xxv, matthew vii
matthew xxii » matthew xxv, matthew xvi
21 sermons » 2 sermons, 6 sermons, 14 sermons
1 sermons » 2 sermons
21 early » 2.1 early, 11 early, 1.1 early
20 early » 10 early, 1820 early, 1720 early
2f early » 24 early, 22 early, 23 early
c 51 » c 1, c 5, _ 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))%c 51 %((21 sermons) OR (1 sermons)) %((((2f early) OR (20 early))) OR (((21 early) OR (1 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))%c 51 %((21 sermons) or (1 sermons)) %((((2f early) OR (20 early))) or (((21 early) or (1 early)))) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %2f ((matthew xxviii) or (matthew xxii))%c 51 %((21 sermons) or (1 sermons)) %((((2f early) OR (20 early))) or (((21 early) or (1 early)))) works to 1800%22*.