Perhaps you should try some spelling variations:
agent conversations » late conversations
22christian agent » christian advent, christian parent
reef history » brief history, reeves history, reef fishery
17th century » 18th century, 19th century
20th century » 18th century
12 germany » 11 germany, 12 german, 2 germany

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian agent conversations %12 germany %reef history %2023 ((17th century) OR (20th century))%22".
• Adding a wildcard symbol may retrieve word variants: %22christian agent conversations %12 germany %reef history %2023 ((17th century) OR (20th century))%22*.