Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christians upon » christians among, christians from, christians being
ref history » reef history, brief history, bief history
21 germany » 11 germany, 2 germany, 20 germany
2.2 20th » 2020 20th, 2023 20th, 2021 20th
2020 5th » 2020 16th

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: %christians upon conversations %21 germany %ref history %((2.2 20th) OR (2020 5th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %christians upon conversations %21 germany %ref history %((2.2 20th) or (2020 5th)) century%22*.