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
2 germany » 7 germany, 2 german, 8 germany
2.2 18th » 2021 18th, 2022 18th, 2023 18th

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 %((2 germany) OR (11 germany)) %ref history %2.2 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((2 germany) or (11 germany)) %ref history %2.2 18th century%22*.