Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
ref history » reef history, brief history, bief history
21 germany » 11 germany, 20 germany, 7 germany
2 germany » 7 germany, 2 german, 8 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: %christian upon conversations %((2 germany) OR (21 germany)) %ref history %2f ((20th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian upon conversations %((2 germany) or (21 germany)) %ref history %2f ((20th century) OR (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((2 germany) or (21 germany)) %ref history %2f ((20th century) OR (18th century))%22*.