Perhaps you should try some spelling variations:
serious conversation » curious conversations, serious conideration, versus conversation
22christian serious » christian sermons
ref history » reef history, brief history, bief history
21 germany » 11 germany, 2 germany, 20 germany
2022 20th » 2022 10th, 2020 20th, 2022 25th
2023 20th » 2023 26th, 2023 10th, 2020 20th
2.2 20th » 2020 20th, 2021 20th, 2012 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: %22christian serious conversation %21 germany %ref history %((((2.2 20th) OR (2022 20th))) OR (2023 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian serious conversation %21 germany %ref history %((((2.2 20th) OR (2022 20th))) or (2023 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian serious conversation %21 germany %ref history %((((2.2 20th) OR (2022 20th))) or (2023 20th)) century%22*.