Perhaps you should try some spelling variations:
15 matthew » _ matthew, 8 matthew
6 matthew » _ matthew, 8 matthew
12 early » 2 early, 11 early, 1722 early
20 51 » 290 51, 20 21, 24 51
c 51 » c 5, _ 51, c 11

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 (6 matthew)) xxviii%((((2((c 51) OR (c 1))) OR (20 51))) OR (((c 51) OR (c 1)))) %2 sermons %12 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 (6 matthew)) xxviii%((((2((c 51) OR (c 1))) or (20 51))) or (((c 51) OR (c 1)))) %2 sermons %12 early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %((15 matthew) or (6 matthew)) xxviii%((((2((c 51) OR (c 1))) or (20 51))) or (((c 51) OR (c 1)))) %2 sermons %12 early works to 1800%22*.