Perhaps you should try some spelling variations:
win conversations » when conversations, ai conversations, ip conversations
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
imf history » brief history
11 germany » 11 german, 1918 germany, 7 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 ((design considerations) OR (win conversations)) %((11 germany) OR (2.1 germany)) %imf history %2f 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %22christian ((design considerations) or (win conversations)) %((11 germany) or (2.1 germany)) %imf history %2f 20th century%22*.