Perhaps you should try some spelling variations:
union conversations » win conversations, design conversations, driven conversations
20th century » 18th century
20 germany » 8 germany, 5 germany, 4 germany
2f history » imf history, etf history, ref history
6 germany » 8 germany, 5 germany
2 germany » 2 german, 8 germany, 5 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 ((union conversations) OR (design considerations)) %((((((20 germany) OR (6 germany))) OR (7 germany))) OR (2 germany)) %2f history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((union conversations) or (design considerations)) %((((((20 germany) OR (6 germany))) or (7 germany))) or (2 germany)) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((union conversations) or (design considerations)) %((((((20 germany) OR (6 germany))) or (7 germany))) or (2 germany)) %2f history %2f 20th century%22*.