Perhaps you should try some spelling variations:
2f education » f education, elf education, jrf education
ref history » reef history, brief history, bief history
20 germany » 2 germany, 7 germany, 5 germany
8 germany » 7 germany, 1918 germany

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: %22jews %2f education %((20 germany) OR (8 germany)) %((_ bavaria) OR (ne bavaria)) %ref history%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22jews %2f education %((20 germany) OR (8 germany)) %((_ bavaria) or (ne bavaria)) %ref history%22".
• Adding a wildcard symbol may retrieve word variants: %22jews %2f education %((20 germany) OR (8 germany)) %((_ bavaria) or (ne bavaria)) %ref history%22*.