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 history, brief hystory, reef history
20th century » 18th century
imf history » brief history
2.1 germany » 21 germany, 2017 germany, 9.13 germany
2f history » etf history, ref history, tnf history
20 germany » 2 germany, 7 germany, 8 germany
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 (win conversations)) %((20 germany) OR (2.1 germany)) %((((2f history) OR (bief history))) OR (imf history)) %2f 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 (2.1 germany)) %((((2f history) or (bief history))) or (imf history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) OR (win conversations)) %((20 germany) or (2.1 germany)) %((((2f history) or (bief history))) or (imf history)) %2f 20th century%22*.