Perhaps you should try some spelling variations:
design conversations » design considerations, design construction, design consideration
design conclusions » design conclusion
reef history » brief history, reeves history, reef fishery
etf history » imf history, ref history, tnf history
11 germany » 11 german, 1918 germany, _ germany
21 germany » 2 germany, 20 germany, _ germany
2020 20th » 2020 16th, 2020 2021, 2020 5th
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 ((design conversations) OR (design conclusions)) %((21 germany) OR (11 germany)) %((etf history) OR (reef history)) %((2f 20th) OR (2020 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((design conversations) OR (design conclusions)) %((21 germany) or (11 germany)) %((etf history) or (reef history)) %((2f 20th) or (2020 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((design conversations) OR (design conclusions)) %((21 germany) or (11 germany)) %((etf history) or (reef history)) %((2f 20th) or (2020 20th)) century%22*.