Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christians upon » christians among, christians from, christians being
bief history » brief history, brief hystory, reef history
2.1 germany » 21 germany, 2017 germany, 9.13 germany
imf history » brief history
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: %christians upon conversations %2.1 germany %((imf history) OR (bief history)) %2020 18th century%22.
• Adding a wildcard symbol may retrieve word variants: %christians upon conversations %2.1 germany %((imf history) or (bief history)) %2020 18th century%22*.