Perhaps you should try some spelling variations:
natural topology » neural topology, natural phonology, featural typology
1722 early » 1727 early
22 early » 2 early, 12 early, 1.2 early
20 early » 1820 early, 1720 early
10 early » 1800 early, 1820 early, 1770 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 (natural theology)) %((((22 early) OR (1722 early))) OR (((20 early) OR (10 early)))) works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %((natural topology) or (natural theology)) %((((22 early) or (1722 early))) or (((20 early) or (10 early)))) works to 1800%22*.