Perhaps you should try some spelling variations:
curious conversion » curious confession, curious conversations, cur's conversion
2.1 germany » 21 germany, 2017 germany, 9.13 germany
20 germany » 2 germany, 7 germany, 8 germany
2f history » 2.1 history, imf history, etf history

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 conversion %((20 germany) OR (2.1 germany)) %2f history %2020 ((20th century) OR (18th century))%22.
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