Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christianity upon » christianity among, christianity along, christianity from
bief history » brief history, brief hystory, imf history
ref history » reef history, brief history, imf history
21 germany » 2.1 germany, 11 germany, 2 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th
2023 20th » 2023 26th, 2023 10th, 2023 24th
2.2 20th » 2021 20th, 2022 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: %christianity upon conversations %21 germany %((ref history) OR (bief history)) %((((2.2 20th) OR (2020 20th))) OR (2023 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christianity upon conversations %21 germany %((ref history) or (bief history)) %((((2.2 20th) OR (2020 20th))) or (2023 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %christianity upon conversations %21 germany %((ref history) or (bief history)) %((((2.2 20th) OR (2020 20th))) or (2023 20th)) century%22*.