Perhaps you should try some spelling variations:
unchristian design » unchristian diversion, unchristian usage, unchristian divisions
christian designed » christianity designed, christ designed, christian divine
20th century » 18th century
reef history » brief history, reeves history, reef fishery
ref history » brief history, bief history, imf history
tnf history » imf history, etf history, motif history
20 germany » 2 germany, 7 germany, 8 germany
2f germany » 2 germany, 21 germany, 25 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 design) OR (unchristian design))) OR (christian designed)) conversations %((2f germany) OR (20 germany)) %((tnf history) OR (((ref history) OR (reef history)))) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22christian design) or (unchristian design))) or (christian designed)) conversations %((2f germany) or (20 germany)) %((tnf history) or (((ref history) OR (reef history)))) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %((((22christian design) or (unchristian design))) or (christian designed)) conversations %((2f germany) or (20 germany)) %((tnf history) or (((ref history) OR (reef history)))) %2f 20th century%22*.