Perhaps you should try some spelling variations:
2 germany » 7 germany, 2 german, 8 germany
2023 26th » 2023 6th, 2023 5th, 2023 7th
2020 20th » 2020 16th, 2020 2021, 2020 5th
20 20th » 2019 20th, 2023 20th, 2021 20th
90 20th » 1990 20th
94 20th » 4 20th, 94 24th, 1994 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 (((2023 26th) OR (2020 20th))))) OR (((90 20th) OR (94 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 (((2023 26th) or (2020 20th))))) or (((90 20th) OR (94 20th)))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %2 germany %brief history %((((20 20th) or (((2023 26th) or (2020 20th))))) or (((90 20th) OR (94 20th)))) century%22*.