Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, conscious conversations
20th century » 18th century
ref history » reef history, brief history, bief history
21 germany » 11 germany, 2 germany, 20 germany
2023 20th » 2023 26th, 2023 10th, 2020 20th

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 ((curious conversations) OR (courageous conversations)) %((21 germany) OR (7 germany)) %ref history %2023 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((curious conversations) OR (courageous conversations)) %((21 germany) or (7 germany)) %ref history %2023 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((curious conversations) OR (courageous conversations)) %((21 germany) or (7 germany)) %ref history %2023 20th century%22*.