Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
ref history » reef history, bief history, imf history
2.2 20th » 2020 20th, 2023 20th, 2021 20th
2f 20th » 20 20th

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: %22christian curious conversations %7 germany %((brief history) OR (ref history)) %((2f 20th) OR (2.2 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian curious conversations %7 germany %((brief history) or (ref history)) %((2f 20th) OR (2.2 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian curious conversations %7 germany %((brief history) or (ref history)) %((2f 20th) OR (2.2 20th)) century%22*.