Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
bief history » brief history, brief hystory, imf history
ref history » reef history, brief history, imf history
21 germany » 2.1 germany, 11 germany, 20 germany
2 germany » 12 germany, 7 germany, 2 german
2020 18th » 2020 16th, 2020 15th, 2020 8th

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 (2 germany)) %((ref history) OR (bief history)) %2020 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian upon conversations %((21 germany) OR (2 germany)) %((ref history) or (bief history)) %2020 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((21 germany) OR (2 germany)) %((ref history) or (bief history)) %2020 18th century%22*.