Perhaps you should try some spelling variations:
upon conversations » union conversations, spoken conversations, human conversations
open conversations » agent conversations, roman conversations, content conversations
9.13 germany » 9.14 germany, 9.15 germany, 9.16 germany
20th century » 18th century
11 germany » 11 german, 1918 germany, 7 germany
2f history » imf history, etf history, ref history
2020 20th » 2020 16th, 2020 2021, 2020 5th

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) OR (open conversations)) %((11 germany) OR (9.13 germany)) %2f history %2020 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian ((upon conversations) or (open conversations)) %((11 germany) or (9.13 germany)) %2f history %2020 20th century%22*.