Perhaps you should try some spelling variations:
ingenious conversation » religious conversation
curious conversations » curious conversion, serious conversation, courageous conversations
etf history » reef history, ref history, tnf history
imf history » brief history
2 german » 3 german, 5 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: %22christian ((curious conversations) OR (ingenious conversation)) %2 german %((etf history) OR (imf history)) %2f ((20th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22christian ((curious conversations) or (ingenious conversation)) %2 german %((etf history) or (imf history)) %2f ((20th century) OR (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %22christian ((curious conversations) or (ingenious conversation)) %2 german %((etf history) or (imf history)) %2f ((20th century) OR (18th century))%22*.