Perhaps you should try some spelling variations:
matthew xxviii » matthew xxii, matthew xxv, matthew vii
matthew xiii » matthew xxii, matthew xxiv, matthew xxv
matthew xvi » matthew xxii, matthew xxv
14 sermons » 1 sermons, 6 sermons
4 sermons » 1 sermons, 6 sermons, 8 sermons
2f early » 24 early, 20 early, 21 early
2c 51 » 24 51, c 51, 20 51

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 xxviii) OR (((matthew xiii) OR (matthew xvi))))%2c 51 %((((2((4 sermons) OR (14 sermons))) OR (((4 sermons) OR (14 sermons))))) OR (2 sermons)) %2f early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22bible %2f n.t %2f ((matthew xxviii) or (((matthew xiii) OR (matthew xvi))))%2c 51 %((((2((4 sermons) or (14 sermons))) or (((4 sermons) or (14 sermons))))) or (2 sermons)) %2f early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22bible %2f n.t %2f ((matthew xxviii) or (((matthew xiii) OR (matthew xvi))))%2c 51 %((((2((4 sermons) or (14 sermons))) or (((4 sermons) or (14 sermons))))) or (2 sermons)) %2f early works to 1800%22*.