Perhaps you should try some spelling variations:
union conversations » win conversations, curious conversations, design conversations
design conclusions » design conclusion
20th century » 18th century
2017 germany » 20 germany, 17 germany, 2006 germany
imf history » brief history
2.1 germany » 9.13 germany, 9.14 germany, 9.15 germany
etf history » reef history, ref history, tnf history
2f history » ref history, tnf history, reef history
21 germany » 11 germany, 2 germany, 20 germany
2f 20th » 20 20th, 2.2 20th

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 ((union conversations) OR (design conclusions)) %((21 germany) OR (((2.1 germany) OR (2017 germany)))) %((((2f history) OR (imf history))) OR (etf history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) or (design conclusions)) %((21 germany) or (((2.1 germany) OR (2017 germany)))) %((((2f history) or (imf history))) or (etf history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) or (design conclusions)) %((21 germany) or (((2.1 germany) OR (2017 germany)))) %((((2f history) or (imf history))) or (etf history)) %2f 20th century%22*.