Perhaps you should try some spelling variations:
spoken conversations » spoken conversation, open conversations, oboen conversations
upon conversations » union conversations, open conversations, human conversations
tnf history » imf history, etf history, motif history
ref history » reef history, brief history, bief history
11 germany » 11 german, 1918 germany, 7 germany
2 germany » 12 germany, 7 germany, 2 german

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) OR (spoken conversations)) %((2 germany) OR (11 germany)) %((tnf history) OR (ref history)) %2f 18th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((upon conversations) OR (spoken conversations)) %((2 germany) or (11 germany)) %((tnf history) or (ref history)) %2f 18th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((upon conversations) OR (spoken conversations)) %((2 germany) or (11 germany)) %((tnf history) or (ref history)) %2f 18th century%22*.