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