Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
ref history » reef history, brief history, bief history
11 germany » 11 german, 1918 germany, 7 germany
2022 18th » 2022 17th, 2022 8th, 2022 10th
2.2 18th » 2021 18th, 2023 18th, 2012 18th

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 upon conversations %11 germany %ref history %((2.2 18th) OR (2022 18th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %11 germany %ref history %((2.2 18th) or (2022 18th)) century%22*.