Perhaps you should try some spelling variations:
curious conversations » curious conversion, courageous conversations, conscious conversations
serious conversation » serious conideration, versus conversation, ingenious conversation
union conversations » win conversations, design conversations, driven conversations
bief history » brief history, brief hystory, imf history
ref history » reef history, brief history, imf history
tnf history » imf history, etf history, motif history
2 germany » 7 germany, 2 german, 8 germany
2f 20th » 2.2 20th
20 20th » 90 20th, 2019 20th, 2020 20th

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: %22christian ((union conversations) OR (((curious conversations) OR (serious conversation)))) %2 germany %((((tnf history) OR (ref history))) OR (bief history)) %((2f 20th) OR (20 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) or (((curious conversations) OR (serious conversation)))) %2 germany %((((tnf history) or (ref history))) or (bief history)) %((2f 20th) or (20 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) or (((curious conversations) OR (serious conversation)))) %2 germany %((((tnf history) or (ref history))) or (bief history)) %((2f 20th) or (20 20th)) century%22*.