Perhaps you should try some spelling variations:
2c john » c john, 23 john, 21 john
22 john » 12 john, 23 john
20 1724 » 20 1721, 28 1724, 29 1724
20 1764 » 20 1767
20 1714 » 20th 1714
20 1794 » 28 1794, 20 1798, 20 1792
2 john » 1 john, 3 john, 4 john
2 1794 » 28 1794

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: %22brown%((2c john) OR (((22 john) OR (2 john)))) %((((((20 1724) OR (((20 1734) OR (20 1764))))) OR (20 1714))) OR (((20 1794) OR (2 1794))))-1791%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22brown%((2c john) or (((22 john) or (2 john)))) %((((((20 1724) or (((20 1734) OR (20 1764))))) or (20 1714))) or (((20 1794) or (2 1794))))-1791%22".
• Adding a wildcard symbol may retrieve word variants: %22brown%((2c john) or (((22 john) or (2 john)))) %((((((20 1724) or (((20 1734) OR (20 1764))))) or (20 1714))) or (((20 1794) or (2 1794))))-1791%22*.