Perhaps you should try some spelling variations:
20th century » 18th century
20 germany » 2 germany, _ germany, 7 germany
21 germany » 2.1 germany, 2 germany, 1 germany
11 germany » 11 german, 1918 germany, 7 germany
2.2 20th » 2020 20th, 2023 20th, 2021 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 %((20 germany) OR (((21 germany) OR (11 germany)))) %((imf history) OR (brief history)) %2.2 20th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((20 germany) or (((21 germany) or (11 germany)))) %((imf history) OR (brief history)) %2.2 20th century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((20 germany) or (((21 germany) or (11 germany)))) %((imf history) OR (brief history)) %2.2 20th century%22*.