Perhaps you should try some spelling variations:
serious conversation » curious conversations, serious conideration, versus conversation
22christian serious » christian sermons
reef history » brief history, reeves history, reef fishery
2023 16th » 2020 16th, 2023 6th, 2023 26th
2023 11th » 2023 5th, 2023 7th, 2023 8th

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian serious conversation %7 germany %reef history %((2023 16th) OR (2023 11th)) century%22".
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