Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
1918 germany » 8 germany
20th century » 18th century
ref history » reef history, brief history, bief history
imf history » brief history
11 germany » 11 german, 7 germany, 8 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th

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) OR (1918 germany)) %((ref history) OR (imf history)) %2020 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((11 germany) or (1918 germany)) %((ref history) or (imf history)) %2020 20th century%22*.