Perhaps you should try some spelling variations:
when conversations » open conversations, agent conversations, chain conversations
win conversations » ai conversations, ip conversations, iv conversations
imf history » brief history
2f germany » 2 germany, 21 germany, 25 germany
20 germany » 2 germany, 8 germany, 5 germany
2f history » etf history, ref history, tnf history

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 ((win conversations) OR (when conversations)) %((((2f germany) OR (20 germany))) OR (7 germany)) %((2f history) OR (imf history)) %2f ((20th century) OR (18th century))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian ((win conversations) OR (when conversations)) %((((2f germany) or (20 germany))) or (7 germany)) %((2f history) or (imf history)) %2f ((20th century) or (18th century))%22".
• Adding a wildcard symbol may retrieve word variants: %christian ((win conversations) OR (when conversations)) %((((2f germany) or (20 germany))) or (7 germany)) %((2f history) or (imf history)) %2f ((20th century) or (18th century))%22*.