Perhaps you should try some spelling variations:
union conversations » win conversations, design conversations, driven conversations
beruf history » bern history, berlin history, brief history
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
tnf history » etf history, motif history, stone history
imf history » brief history
ref history » reef history, brief history, bief 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: %christian union conversations %2.1 germany %((((beruf history) OR (((tnf history) OR (imf history))))) OR (ref history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian union conversations %2.1 germany %((((beruf history) or (((tnf history) OR (imf history))))) or (ref history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian union conversations %2.1 germany %((((beruf history) or (((tnf history) OR (imf history))))) or (ref history)) %2f 20th century%22*.