Perhaps you should try some spelling variations:
union conversations » win conversations, design conversations, driven conversations
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
2f history » 2.1 history, imf history, etf history
2 germany » 12 germany, 7 germany, 2 german
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 (((design conclusions) OR (design conclusion)))) %((2 germany) OR (2.1 germany)) %2f history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) or (((design conclusions) OR (design conclusion)))) %((2 germany) or (2.1 germany)) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) or (((design conclusions) OR (design conclusion)))) %((2 germany) or (2.1 germany)) %2f history %2f 20th century%22*.