Perhaps you should try some spelling variations:
1.1 early » 1791 early, 1771 early, 1761 early
2f early » 20 early, 22 early, f early
21 early » 2.1 early
11 early » 1791 early, 5 early
8 early » 5 early

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: %22opera %((2f early) OR (((((21 early) OR (1.1 early))) OR (((11 early) OR (8 early)))))) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22opera %((2f early) or (((((21 early) or (1.1 early))) or (((11 early) OR (8 early)))))) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22opera %((2f early) or (((((21 early) or (1.1 early))) or (((11 early) OR (8 early)))))) works to 1800%22*.