Perhaps you should try some spelling variations:
open conversations » agent conversations, roman conversations, content conversations
christian open » christian opened, christian open'd, christian popes
9.13 germany » 9.14 germany, 9.16 germany, 113 germany
9.15 germany » 9.14 germany, 9.16 germany, 2.1 germany
20th century » 18th century
imf history » brief history
21 germany » 11 germany, 2 germany, 20 germany
2f history » etf history, ref history, tnf history
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 open conversations %((21 germany) OR (((9.13 germany) OR (9.15 germany)))) %((2f history) OR (imf history)) %2f 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%christian open conversations %((21 germany) or (((9.13 germany) OR (9.15 germany)))) %((2f history) or (imf history)) %2f 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %christian open conversations %((21 germany) or (((9.13 germany) OR (9.15 germany)))) %((2f history) or (imf history)) %2f 20th century%22*.