Perhaps you should try some spelling variations:
2f sermons » 2 sermons, 21 sermons, 24 sermons
2f matthew » 22 matthew, 25 matthew, _ matthew
2 matthew » 22 matthew, 25 matthew, 42 matthew
1.1 early » 1791 early, 1771 early, 1761 early
11 early » 1791 early, 7 early, 8 early
20 51 » 20 21, 24 51, 20 5
2c 51 » 24 51, c 51, 21 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 (2 matthew)) xxviii%((2c 51) OR (20 51)) %2f sermons %((21 early) OR (((((2.1 early) OR (11 early))) OR (1.1 early)))) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22bible %2f n.t %((2f matthew) OR (2 matthew)) xxviii%((2c 51) or (20 51)) %2f sermons %((21 early) or (((((2.1 early) or (11 early))) or (1.1 early)))) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %((2f matthew) OR (2 matthew)) xxviii%((2c 51) or (20 51)) %2f sermons %((21 early) or (((((2.1 early) or (11 early))) or (1.1 early)))) works to 1800%22*.