Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christians upon » christians among, christians from, christians being
reef history » brief history, reeves history, reef fishery
imf history » brief history
21 germany » 11 germany, 2 germany, 20 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 upon conversations %21 germany %((reef history) OR (imf history)) %2.2 ((20th century) OR (18th century))%22.
• Adding a wildcard symbol may retrieve word variants: %christians upon conversations %21 germany %((reef history) or (imf history)) %2.2 ((20th century) or (18th century))%22*.