Perhaps you should try some spelling variations:
when conversations » open conversations, win conversations, agent conversations
christians when » christians who, christians he, christians men
reef history » brief history, reeves history, reef fishery
17th century » 19th century, 20th century
12 germany » 11 germany, 12 german, 2 germany
14 germany » 4 germany, 11 germany, 1945 germany

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: %christians when conversations %((12 germany) OR (14 germany)) %reef history %2023 ((17th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christians when conversations %((12 germany) OR (14 germany)) %reef history %2023 ((17th century) or (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %christians when conversations %((12 germany) OR (14 germany)) %reef history %2023 ((17th century) or (18th century))%22*.