Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
9.13 germany » 9.14 germany, 9.16 germany, 113 germany
9.15 germany » 9.14 germany, 9.16 germany, 2.1 germany
imf history » brief history
21 germany » 11 germany, 2 germany, 20 germany
2f history » etf history, ref history, tnf history
2f 20th » 2.2 20th
20 20th » 90 20th, 2019 20th, 2020 20th

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 %((21 germany) OR (((9.13 germany) OR (9.15 germany)))) %((2f history) OR (imf history)) %((2f 20th) OR (20 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian upon conversations %((21 germany) or (((9.13 germany) OR (9.15 germany)))) %((2f history) or (imf history)) %((2f 20th) or (20 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((21 germany) or (((9.13 germany) OR (9.15 germany)))) %((2f history) or (imf history)) %((2f 20th) or (20 20th)) century%22*.