Perhaps you should try some spelling variations:
unity conversations » union conversations, unit conversions, city conversation
party conversations » late conversations
bief history » brief hystory, imf history, reef history
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
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: %christian ((unity conversations) OR (party conversations)) %((20 germany) OR (2.1 germany)) %((brief history) OR (bief history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((unity conversations) OR (party conversations)) %((20 germany) or (2.1 germany)) %((brief history) or (bief history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((unity conversations) OR (party conversations)) %((20 germany) or (2.1 germany)) %((brief history) or (bief history)) %2f 20th century%22*.