Perhaps you should try some spelling variations:
2f fiction » f fiction, 2 fiction, la fiction
1720 early » 1727 early, 1820 early, 1770 early
sf early » ef early, f early, self early
21 early » 2.1 early, 11 early, 1.1 early
22 early » 2 early, 12 early, 1722 early
20 early » 10 early, 1820 early

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "%22ethiopia %2f fiction %((((((sf early) OR (((21 early) OR (1 early))))) OR (22 early))) OR (((20 early) OR (1720 early)))) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22ethiopia %2f fiction %((((((sf early) OR (((21 early) OR (1 early))))) OR (22 early))) OR (((20 early) OR (1720 early)))) works to 1800%22*.