Perhaps you should try some spelling variations:
22natural theology » natural theology, natural teleology, natural topology
1720 early » 1727 early, 1820 early, 1770 early
2.3 early » 13 early
sf early » ef early, self early, imf early
23 early » 13 early, 33 early, 1723 early
f early » ef early, 7 early, 8 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: %22natural theology %((((((e((f early) OR (sf early))) OR (((f early) OR (sf early))))) OR (((23 early) OR (2.3 early))))) OR (1720 early)) works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22natural theology %((((((e((f early) OR (sf early))) or (((f early) OR (sf early))))) or (((23 early) or (2.3 early))))) or (1720 early)) works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22natural theology %((((((e((f early) OR (sf early))) or (((f early) OR (sf early))))) or (((23 early) or (2.3 early))))) or (1720 early)) works to 1800%22*.