Perhaps you should try some spelling variations:
2 germany » 7 germany, 2 german, 8 germany
2023 20th » 2023 26th, 2023 10th, 2020 20th
20 20th » 90 20th, 2019 20th, 2020 20th
94 20th » 4 20th, 90 20th, 1994 20th
94 24th » 94 4th, 94 14th, 24 24th

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 20th) OR (2020 2021))))) OR (((94 20th) OR (94 24th)))) 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 20th) or (2020 2021))))) or (((94 20th) OR (94 24th)))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %2 germany %brief history %((((20 20th) or (((2023 20th) or (2020 2021))))) or (((94 20th) OR (94 24th)))) century%22*.