Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
reef history » brief history, reeves history, reef fishery
21 germany » 11 germany, 2 germany, 20 germany
2.2 18th » 2021 18th, 2022 18th, 2023 18th
2021 5th » 2021 6th, 2021 7th

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 %21 germany %reef history %((2.2 18th) OR (2021 5th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian curious conversations %21 germany %reef history %((2.2 18th) or (2021 5th)) century%22*.