Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
design conclusions » design conclusion
2.1 germany » 21 germany, 2017 germany, 9.13 germany
imf history » brief history
2f history » etf history, ref history, tnf history
20 18th » 2017 18th, 2021 18th, 2018 18th

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: %22christian ((curious conversations) OR (design conclusions)) %2.1 germany %((2f history) OR (imf history)) %20 18th century%22.
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