Perhaps you should try some spelling variations:
design conversations » design considerations, design construction, design conclusions
union conversations » win conversations, driven conversations, invent conversations
20th century » 18th century
bief history » brief history, brief hystory, brief herstory
reef history » brief history, reeves history, reef fishery
ref history » brief history, etf history, tnf history
imf history » brief history
20 germany » 2 germany, 7 germany, 8 germany
21 germany » 11 germany, 2 germany, 7 germany
2f germany » 2 germany, 25 germany, 26 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: %22christian ((union conversations) OR (design conversations)) %((((2f germany) OR (21 germany))) OR (20 germany)) %((((((imf history) OR (reef history))) OR (ref history))) OR (bief history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((union conversations) or (design conversations)) %((((2f germany) OR (21 germany))) or (20 germany)) %((((((imf history) or (reef history))) or (ref history))) or (bief history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((union conversations) or (design conversations)) %((((2f germany) OR (21 germany))) or (20 germany)) %((((((imf history) or (reef history))) or (ref history))) or (bief history)) %2f 20th century%22*.