Perhaps you should try some spelling variations:
bief history » brief history, brief hystory, reef history
20th century » 18th century
2.1 germany » 21 germany, 2017 germany, 9.13 germany
imf history » brief history
2 germany » 7 germany, 2 german, 8 germany
20 20th » 90 20th, 2019 20th, 2020 20th

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: %22agriculture AND state %((2 germany) OR (2.1 germany)) %((bief history) OR (imf history)) %20 20th century%22.
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((2 germany) or (2.1 germany)) %((bief history) or (imf history)) %20 20th century%22*.