Perhaps you should try some spelling variations:
curious conversion » curious confession, curious conversations, cur's conversion
design conclusions » design conclusion
11 germany » 11 german, 1918 germany, 7 germany
2f history » imf history, etf history, ref history
2017 18th » 2017 14th, 2017 16th, 2017 4th

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• If you are trying to use Boolean operators, they must be ALL CAPS: %22christian ((curious conversion) OR (design conclusions)) %11 germany %2f history %2017 18th century%22.
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