Perhaps you should try some spelling variations:
21 germany » 20 germany, 8 germany, 5 germany
11 germany » 11 german, 1918 germany, 8 germany
2f history » imf history, etf history, ref history
2 germany » 2 german, 8 germany, 5 germany
2020 20th » 2020 16th, 2020 2021, 2020 5th
20 20th » 90 20th, 2019 20th, 2023 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: %22agriculture AND state %((((21 germany) OR (((11 germany) OR (7 germany))))) OR (2 germany)) %2f history %((20 20th) OR (2020 20th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((((21 germany) or (((11 germany) or (7 germany))))) or (2 germany)) %2f history %((20 20th) OR (2020 20th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((((21 germany) or (((11 germany) or (7 germany))))) or (2 germany)) %2f history %((20 20th) OR (2020 20th)) century%22*.