Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
design conversations » design considerations, design construction, design conclusions
union conversations » win conversations, driven conversations, invent conversations
20th century » 18th century
2.1 germany » 2017 germany, 9.13 germany, 9.14 germany
ref history » reef history, brief history, bief history
20 germany » 2 germany, 7 germany, 8 germany
21 germany » 11 germany, 2 germany, 25 germany
2.2 20th » 2020 20th, 2023 20th, 2021 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 (curious conversations))) OR (design conversations)) %((20 germany) OR (((2.1 germany) OR (21 germany)))) %ref history %2.2 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((((union conversations) or (curious conversations))) or (design conversations)) %((20 germany) or (((2.1 germany) OR (21 germany)))) %ref history %2.2 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((((union conversations) or (curious conversations))) or (design conversations)) %((20 germany) or (((2.1 germany) OR (21 germany)))) %ref history %2.2 20th century%22*.