Perhaps you should try some spelling variations:
during conversations » during conversation, during conversational, using conversations
driven conversations » driven conversational, live conversations, lives conversations
design conversations » design considerations, design construction, design conclusions
union conversations » win conversations, curious conversations, invent conversations
20th century » 18th century
ref history » reef history, brief history, bief history
2.1 germany » 21 germany, 2017 germany, 9.13 germany
2f history » imf history, etf history, tnf history
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 (during conversations))) OR (driven conversations))) OR (design conversations)) %((7 germany) OR (2.1 germany)) %((2f history) OR (ref history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((((((union conversations) OR (during conversations))) or (driven conversations))) or (design conversations)) %((7 germany) or (2.1 germany)) %((2f history) or (ref history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((((((union conversations) OR (during conversations))) or (driven conversations))) or (design conversations)) %((7 germany) or (2.1 germany)) %((2f history) or (ref history)) %2f 20th century%22*.