Perhaps you should try some spelling variations:
2f emperor » _ emperor, i emperor, ii emperor
12 1769 » 12 1761, 12 1766, 12 1799
12 1762 » 12 1792, 12 1702, 12 1761
1 1769 » 1 1799, 1 1789, 3 1769
_ 1769 » _ 1789, _ 1759, _ 1799
25 i » 25 _, 25 a, 5 i
20 a » 20 _

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: %22napoleon %((((25 i) OR (20 a))) OR (2 i)) %2f emperor of the french %((((12 1769) OR (12 1762))) OR (((1 1769) OR (_ 1769))))-1821%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22napoleon %((((25 i) or (20 a))) or (2 i)) %2f emperor of the french %((((12 1769) or (12 1762))) or (((1 1769) OR (_ 1769))))-1821%22".
• Adding a wildcard symbol may retrieve word variants: %22napoleon %((((25 i) or (20 a))) or (2 i)) %2f emperor of the french %((((12 1769) or (12 1762))) or (((1 1769) OR (_ 1769))))-1821%22*.