Perhaps you should try some spelling variations:
2f sermons » 2 sermons, 21 sermons, 24 sermons
22 matthew » 2 matthew, 25 matthew, 42 matthew
2f matthew » 2 matthew, 25 matthew, 15 matthew
10 early » 1800 early, 1820 early, 1770 early
20 early » 1820 early, 1720 early
2f early » 21 early, ef early, f early
2c 51 » 24 51, 20 51, 21 51
c 51 » c 1, c 5, _ 51

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: %22bible %2f n.t %((2f matthew) OR (((_ matthew) OR (22 matthew)))) xxviii%((2c 51) OR (c 51)) %2f sermons %((2f early) OR (((20 early) OR (10 early)))) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22bible %2f n.t %((2f matthew) or (((_ matthew) or (22 matthew)))) xxviii%((2c 51) or (c 51)) %2f sermons %((2f early) or (((20 early) OR (10 early)))) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %((2f matthew) or (((_ matthew) or (22 matthew)))) xxviii%((2c 51) or (c 51)) %2f sermons %((2f early) or (((20 early) OR (10 early)))) works to 1800%22*.