Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christians upon » christians among, christians from, christians being
bief history » brief history, brief hystory, imf history
20th century » 18th century
tnf history » imf history, etf history, motif history
ref history » reef history, brief history, imf history
2f germany » 20 germany, 21 germany, 25 germany
2 germany » 7 germany, 2 german, 8 germany
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: %christians upon conversations %((2f germany) OR (2 germany)) %((((tnf history) OR (ref history))) OR (bief history)) %20 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christians upon conversations %((2f germany) OR (2 germany)) %((((tnf history) or (ref history))) or (bief history)) %20 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christians upon conversations %((2f germany) OR (2 germany)) %((((tnf history) or (ref history))) or (bief history)) %20 20th century%22*.