Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christianity upon » christianity among, christianity along, christianity from
reeves history » waves history, lives history, heresies history
ref history » reef history, brief history, bief 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: %christianity upon conversations %21 germany %((ref history) OR (reeves history)) %2023 ((20th century) OR (18th century))%22.
• Adding a wildcard symbol may retrieve word variants: %christianity upon conversations %21 germany %((ref history) or (reeves history)) %2023 ((20th century) or (18th century))%22*.