Perhaps you should try some spelling variations:
curious conversations » curious conversion, courageous conversations, conscious conversations
serious conversation » serious conideration, versus conversation, ingenious conversation
motif history » motion history, motive history, motets history
imf history » brief history
2 germany » 12 germany, 7 germany, 2 german
2018 18th » 2018 15th, 2018 14th, 2018 10th

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 ((curious conversations) OR (serious conversation)) %2 germany %((motif history) OR (imf history)) %2018 18th century%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((curious conversations) OR (serious conversation)) %2 germany %((motif history) or (imf history)) %2018 18th century%22*".