Perhaps you should try some spelling variations:
2f history » 2.1 history, imf history, etf history
21 germany » 2.1 germany, 11 germany, 2 germany
1994 20th » 1995 20th, 1999 20th, 1994 24th
1994 10th » 1994 15th, 1994 19th, 1995 10th
1990 20th » 1995 20th, 1999 20th, 1990 2000
20 20th » 2019 20th, 2020 20th, 2023 20th
94 20th » 4 20th, 94 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 %21 germany %2f history %((20 20th) OR (((90 20th) OR (((94 20th) OR (((((1994 20th) OR (1994 10th))) OR (1990 20th)))))))) century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22agriculture and state %21 germany %2f history %((20 20th) or (((90 20th) or (((94 20th) or (((((1994 20th) OR (1994 10th))) or (1990 20th)))))))) century%22".
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %21 germany %2f history %((20 20th) or (((90 20th) or (((94 20th) or (((((1994 20th) OR (1994 10th))) or (1990 20th)))))))) century%22*.