Perhaps you should try some spelling variations:
union conversations » curious conversations, design conversations, driven conversations
win conversations » when conversations, wine conversation, wins conversation
20th century » 18th century
bief history » brief history, brief hystory, imf history
reef history » brief history, reeves history, reef fishery
2017 germany » 17 germany, 2006 germany, 1917 germany
ref history » brief history, imf history, etf history
2.1 germany » 9.13 germany, 9.14 germany, 9.15 germany
21 germany » 11 germany, 2 germany, 25 germany
20 germany » 2 germany, 7 germany, 8 germany
20 20th » 90 20th, 2019 20th, 2020 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 (win conversations)) %((20 germany) OR (((21 germany) OR (((2.1 germany) OR (2017 germany)))))) %((((reef history) OR (ref history))) OR (bief history)) %20 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) OR (win conversations)) %((20 germany) or (((21 germany) or (((2.1 germany) or (2017 germany)))))) %((((reef history) or (ref history))) or (bief history)) %20 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) OR (win conversations)) %((20 germany) or (((21 germany) or (((2.1 germany) or (2017 germany)))))) %((((reef history) or (ref history))) or (bief history)) %20 20th century%22*.