Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
ref history » reef history, brief history, bief history
11 germany » 11 german, 1918 germany, 7 germany

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian upon conversations %11 germany %ref history %2.2 ((20th century) OR (18th century))%22".
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