Perhaps you should try some spelling variations:
curious conversations » curious conversion, serious conversation, courageous conversations
win conversations » when conversations, wine conversation, wins conversation
bief history » brief history, brief hystory, imf history
20th century » 18th century
etf history » reef history, imf history, tnf history
ref history » reef history, brief history, imf history
2f germany » 2 germany, 20 germany, 21 germany
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: %22christian ((win conversations) OR (curious conversations)) %2f germany %((((etf history) OR (ref history))) OR (bief history)) %2f 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian ((win conversations) or (curious conversations)) %2f germany %((((etf history) or (ref history))) or (bief history)) %2f 20th century%22*.