Perhaps you should try some spelling variations:
20 germany » 2 germany, 7 germany, 5 germany
8 germany » 7 germany, 1918 germany
2023 20th » 2023 10th, 2020 20th, 2023 24th
2023 26th » 2023 6th, 2023 5th, 2023 7th
2f 20th » 2.2 20th
90 20th » 94 20th, 1990 20th
20 20th » 2019 20th, 2020 20th, 2021 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 %((20 germany) OR (8 germany)) %((imf history) OR (brief history)) %((2f 20th) OR (((((20 20th) OR (((2023 20th) OR (2023 26th))))) OR (90 20th)))) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((20 germany) or (8 germany)) %((imf history) or (brief history)) %((2f 20th) or (((((20 20th) or (((2023 20th) OR (2023 26th))))) or (90 20th)))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((20 germany) or (8 germany)) %((imf history) or (brief history)) %((2f 20th) or (((((20 20th) or (((2023 20th) OR (2023 26th))))) or (90 20th)))) century%22*.