Perhaps you should try some spelling variations:
union conversations » win conversations, design conversations, driven conversations
design conclusions » design conclusion
2017 germany » 20 germany, 2006 germany, 1917 germany
20th century » 18th century
21 germany » 11 germany, 2 germany, 20 germany
17 germany » 7 germany, 11 germany, 12 germany
2f history » imf history, etf history, ref history
90 20th » 20 20th, 94 20th, 1990 20th

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 (((2017 germany) OR (17 germany)))) %2f history %90 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 (((2017 germany) OR (17 germany)))) %2f history %90 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) or (design conclusions)) %((21 germany) or (((2017 germany) OR (17 germany)))) %2f history %90 20th century%22*.