Perhaps you should try some spelling variations:
natural topology » natural theology, natural phonology, featural typology
neural topology » neural topologies, general topology, dual topology
1720 early » 1727 early, 1820 early, 1770 early
22 early » 2 early, 12 early, 1722 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: %((natural topology) OR (neural topology)) %((22 early) OR (1720 early)) works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %((natural topology) or (neural topology)) %((22 early) or (1720 early)) works to 1800%22*.