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 » 9.15 germany, 9.16 germany, 113 germany
9.14 germany » 9.15 germany, 9.16 germany, 8.4 germany
20th century » 18th century
21 germany » 11 germany, 2 germany, 20 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 %((21 germany) OR (((9.13 germany) OR (9.14 germany)))) %2f history %2020 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 (9.14 germany)))) %2f history %2020 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((21 germany) or (((9.13 germany) OR (9.14 germany)))) %2f history %2020 20th century%22*.