Perhaps you should try some spelling variations:
22natural theology » natural theology, natural teleology, natural topology
1720 early » 1727 early, 1820 early, 1770 early
20 early » 10 early, 1820 early
23 early » 2.3 early, 3 early, 13 early
f early » ef early, sf early, 7 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 %((((((20 early) OR (f early))) OR (23 early))) OR (1720 early)) works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %22natural theology %((((((20 early) or (f early))) or (23 early))) or (1720 early)) works to 1800%22*.