Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
ref history » reef history, brief history, bief history
2 germany » 7 germany, 2 german, 8 germany
2021 18th » 2021 13th, 2021 16th, 2021 6th
2.2 18th » 2022 18th, 2023 18th, 2012 18th

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: %22christian curious conversations %2 germany %ref history %((2.2 18th) OR (2021 18th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian curious conversations %2 germany %ref history %((2.2 18th) or (2021 18th)) century%22*.