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
imf history » brief history
21 germany » 11 germany, 2 germany, 20 germany
2f history » etf history, ref history, tnf history

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)) %((21 germany) OR (9.13 germany)) %((2f history) OR (imf history)) %2f 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %christian ((upon conversations) or (open conversations)) %((21 germany) or (9.13 germany)) %((2f history) or (imf history)) %2f 18th century%22*.