Perhaps you should try some spelling variations:
15 matthew » _ matthew, j matthew, k matthew
8 matthew » _ matthew, j matthew, k matthew
6 matthew » _ matthew, j matthew, k matthew
6 sermons » 1 sermons
22 early » 2 early, 12 early, 1722 early
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 %((((15 matthew) OR (8 matthew))) OR (6 matthew)) xxviii%c 51 %((2 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%c 51 %((2 sermons) or (6 sermons)) %22 early works to 1800%22*.