Perhaps you should try some spelling variations:
churches conversations » curious conversations, sources conversation, courageous conversations
christian churches » christian church
ref history » reef history, brief history, bief history
21 germany » 2.1 germany, 11 germany, 2 germany
2021 16th » 2020 16th, 2021 6th, 2021 13th
2.2 18th » 2021 18th, 2022 18th, 2023 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: %christian churches conversations %21 germany %ref history %((2.2 18th) OR (2021 16th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %christian churches conversations %21 germany %ref history %((2.2 18th) or (2021 16th)) century%22*.