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
ef early » sf early, self early, ear early
23 early » 13 early, 33 early, 1723 early
f early » sf early, 5 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 %((((((ef early) OR (f 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 %((((((ef early) or (f early))) or (((23 early) or (2.3 early))))) or (1720 early)) works to 1800%22*.