Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
design conversations » design considerations, design construction, design conclusions
2.1 germany » 21 germany, 2017 germany, 9.13 germany
ref history » reef history, bief history, etf history
20 germany » 2 germany, 7 germany, 8 germany
2f history » etf history, tnf history, 7 history

Try widening your search to All Fields.

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 ((curious conversations) OR (design conversations)) %((20 germany) OR (2.1 germany)) %((((2f history) OR (imf history))) OR (((ref history) OR (brief history)))) %2f ((20th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((curious conversations) or (design conversations)) %((20 germany) or (2.1 germany)) %((((2f history) or (imf history))) or (((ref history) or (brief history)))) %2f ((20th century) OR (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((curious conversations) or (design conversations)) %((20 germany) or (2.1 germany)) %((((2f history) or (imf history))) or (((ref history) or (brief history)))) %2f ((20th century) OR (18th century))%22*.