Perhaps you should try some spelling variations:
union conversations » design conversations, driven conversations, invent conversations
win conversations » when conversations, ai conversations, ip conversations
bief history » brief hystory, imf history, reef history
20th century » 18th century
ref history » reef history, imf history, etf history
2f germany » 2 germany, 20 germany, 21 germany
20 20th » 90 20th, 2019 20th, 2020 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 (win conversations)) %2f germany %((((brief 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)) %2f germany %((((brief 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)) %2f germany %((((brief history) or (ref history))) or (bief history)) %20 20th century%22*.