Perhaps you should try some spelling variations:
design conversations » design considerations, design construction, design conclusions
union conversations » win conversations, driven conversations, invent conversations
reef history » brief history, reeves history, reef fishery
etf history » imf history, ref history, tnf history
20 germany » 7 germany, 8 germany, 5 germany
2 germany » 12 germany, 7 germany, 2 german

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 ((union conversations) OR (design conversations)) %((20 germany) OR (2 germany)) %((etf history) OR (reef history)) %2f 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) OR (design conversations)) %((20 germany) or (2 germany)) %((etf history) or (reef history)) %2f 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) OR (design conversations)) %((20 germany) or (2 germany)) %((etf history) or (reef history)) %2f 18th century%22*.