Perhaps you should try some spelling variations:
2f fiction » 2 fiction, a fiction, 3 fiction
1720 early » 1820 early, 1770 early, 1722 early
f fiction » a fiction
2f early » 21 early, f early, sf 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: %22ethiopia %((2f fiction) OR (f fiction)) %((((2f early) OR (22 early))) OR (((20 early) OR (((1720 early) OR (1727 early)))))) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22ethiopia %((2f fiction) OR (f fiction)) %((((2f early) or (22 early))) or (((20 early) or (((1720 early) or (1727 early)))))) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22ethiopia %((2f fiction) OR (f fiction)) %((((2f early) or (22 early))) or (((20 early) or (((1720 early) or (1727 early)))))) works to 1800%22*.