Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christianity upon » christianity among, christianity along, christianity from
bief history » brief hystory, imf history, reef history
ref history » reef history, imf history, etf history
21 germany » 11 germany, 2 germany, 20 germany
2.2 18th » 2021 18th, 2022 18th, 2023 18th

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 (((bief history) OR (brief history)))) %2.2 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christianity upon conversations %21 germany %((ref history) or (((bief history) OR (brief history)))) %2.2 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %christianity upon conversations %21 germany %((ref history) or (((bief history) OR (brief history)))) %2.2 18th century%22*.