Perhaps you should try some spelling variations:
great conversations » agent conversations, chat conversations, creative conversations
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
ref history » reef history, brief history, bief history
imf history » brief history
2.2 20th » 2020 20th, 2023 20th, 2021 20th
%christianity » %christian

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: %christianity great conversations %2.1 germany %((ref history) OR (imf history)) %2.2 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christianity great conversations %2.1 germany %((ref history) or (imf history)) %2.2 20th century%22*.