Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christianity upon » christianity among, christianity from, christians upon
bief history » brief history, brief hystory, imf history
ref history » reef history, brief history, imf history
21 germany » 2.1 germany, 11 germany, 2 germany
2020 18th » 2020 16th, 2020 15th, 2020 8th

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)) %2020 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %christianity upon conversations %21 germany %((ref history) or (bief history)) %2020 18th century%22*.