Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
20th century » 18th century
21 germany » 2 germany, 20 germany, 7 germany
11 germany » 11 german, 1918 germany, 7 germany
20 20th » 90 20th, 2019 20th, 2020 20th

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 %((21 germany) OR (11 germany)) %brief history %20 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((21 germany) or (11 germany)) %brief history %20 20th century%22*.