Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
reef history » brief history, reeves history, reef fishery
2f germany » 20 germany, 21 germany, 25 germany
12 germany » 11 germany, 12 german, 14 germany
2 germany » 7 germany, 2 german, 8 germany

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 curious conversations %((2f germany) OR (((2 germany) OR (12 germany)))) %reef history %2f 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian curious conversations %((2f germany) or (((2 germany) OR (12 germany)))) %reef history %2f 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %22christian curious conversations %((2f germany) or (((2 germany) OR (12 germany)))) %reef history %2f 18th century%22*.