Perhaps you should try some spelling variations:
driven conversations » driven conversational, live conversations, lives conversations
union conversations » win conversations, design conversations, invent conversations
reeves history » waves history, lives history, archives history
10th century » 18th century, 20th century, 19th century
21 germany » 11 germany, 2 germany, 20 germany
2013 10th » 2015 10th, 2013 8th

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) OR (driven conversations)) %21 germany %reeves history %2013 10th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) OR (driven conversations)) %21 germany %reeves history %2013 10th century%22*.