Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
union conversations » win conversations, design conversations, driven conversations
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
21 germany » 11 germany, 2 germany, 20 germany

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %22christian ((union conversations) OR (curious conversations)) %((21 germany) OR (2.1 germany)) %brief history %2f 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) or (curious conversations)) %((21 germany) OR (2.1 germany)) %brief history %2f 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) or (curious conversations)) %((21 germany) OR (2.1 germany)) %brief history %2f 18th century%22*.