Perhaps you should try some spelling variations:
design conversations » design construction, design consideration, design competitions
design conclusions » design conclusion
20th century » 18th century
9.13 germany » 9.14 germany, 9.16 germany, 113 germany
9.15 germany » 9.14 germany, 9.16 germany, 10.10 germany
2.1 germany » 2017 germany, 9.14 germany, 9.16 germany
2f history » imf history, etf history, ref history
21 germany » 11 germany, 2 germany, 20 germany
2f 20th » 20 20th, 2.2 20th

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 ((((design conversations) OR (design considerations))) OR (design conclusions)) %((21 germany) OR (((((2.1 germany) OR (9.15 germany))) OR (9.13 germany)))) %2f history %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((((design conversations) or (design considerations))) or (design conclusions)) %((21 germany) or (((((2.1 germany) OR (9.15 germany))) or (9.13 germany)))) %2f history %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((((design conversations) or (design considerations))) or (design conclusions)) %((21 germany) or (((((2.1 germany) OR (9.15 germany))) or (9.13 germany)))) %2f history %2f 20th century%22*.