Perhaps you should try some spelling variations:
15 matthew » _ matthew
21 sermons » 2 sermons, 1 sermons, 14 sermons
8 matthew » _ matthew
6 matthew » _ matthew
6 sermons » 2 sermons, 1 sermons
22 early » 2 early, 12 early, 1722 early
2c 51 » c 51, 20 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 %((((15 matthew) OR (8 matthew))) OR (6 matthew)) xxviii%((2c 51) OR (24 51)) %((21 sermons) OR (6 sermons)) %22 early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22bible %2f n.t %((((15 matthew) or (8 matthew))) or (6 matthew)) xxviii%((2c 51) OR (24 51)) %((21 sermons) or (6 sermons)) %22 early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %((((15 matthew) or (8 matthew))) or (6 matthew)) xxviii%((2c 51) OR (24 51)) %((21 sermons) or (6 sermons)) %22 early works to 1800%22*.