Perhaps you should try some spelling variations:
2c john » c john, 22 john, 21 john
23 john » 3 john, 13 john
12 john » 2 john, 11 john
20 1764 » 20 1714, 20 1767, 20 1734
20 1791 » 20 1798, 20 1792, 20 1796
20 1794 » 28 1794, 2 1794, 20 1714
2 1791 » 2 1794, 2 1796, 2 1798

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 (23 john))) OR (12 john)) %((((20 1764) OR (((20 1721) OR (((20 1791) OR (2 1791))))))) OR (20 1794))-1791%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22brown%((((2c john) or (23 john))) or (12 john)) %((((20 1764) or (((20 1721) or (((20 1791) OR (2 1791))))))) or (20 1794))-1791%22".
• Adding a wildcard symbol may retrieve word variants: %22brown%((((2c john) or (23 john))) or (12 john)) %((((20 1764) or (((20 1721) or (((20 1791) OR (2 1791))))))) or (20 1794))-1791%22*.