Perhaps you should try some spelling variations:
design conversations » design construction, design conclusions, design consideration
win conversations » when conversations, wine conversation, wins conversation
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
2f history » imf history, etf history, ref 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: %22christian ((win conversations) OR (((design conversations) OR (design considerations)))) %((7 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 ((win conversations) or (((design conversations) OR (design considerations)))) %((7 germany) or (2.1 germany)) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((win conversations) or (((design conversations) OR (design considerations)))) %((7 germany) or (2.1 germany)) %2f history %2f 20th century%22*.