Perhaps you should try some spelling variations:
2f germany » 2 germany, 20 germany, 25 germany
21 germany » 11 germany, 2 germany, 20 germany
2022 18th » 2022 17th, 2022 8th, 2022 10th
2.2 18th » 2021 18th, 2023 18th, 2012 18th

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 %((2f germany) OR (21 germany)) %brief history %((2.2 18th) OR (2022 18th)) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %((2f germany) or (21 germany)) %brief history %((2.2 18th) OR (2022 18th)) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %((2f germany) or (21 germany)) %brief history %((2.2 18th) OR (2022 18th)) century%22*.