Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christian upon » christians upon, christian union, christianity upon
20th century » 18th century
bief history » brief history, brief hystory, imf history
ref history » reef history, brief history, imf history
etf history » reef history, imf history, tnf history
21 germany » 2.1 germany, 11 germany, 1 germany
20 germany » 7 germany, 8 germany, 5 germany
25 germany » 5 germany, 26 germany, 27 germany
2 germany » 12 germany, 7 germany, 2 german
2f 20th » 20 20th, 2.2 20th

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 %((((25 germany) OR (20 germany))) OR (((21 germany) OR (2 germany)))) %((((etf history) OR (ref history))) OR (bief history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian upon conversations %((((25 germany) or (20 germany))) or (((21 germany) OR (2 germany)))) %((((etf history) or (ref history))) or (bief history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian upon conversations %((((25 germany) or (20 germany))) or (((21 germany) OR (2 germany)))) %((((etf history) or (ref history))) or (bief history)) %2f 20th century%22*.