Perhaps you should try some spelling variations:
self education » self medication, deaf education, self replication
2f education » f education, elf education, jrf education
ref history » reef history, bief history, imf history
21 germany » 2 germany, 20 germany, 7 germany
11 germany » 11 german, 1918 germany, 7 germany
13 bavaria » _ bavaria, ne bavaria, ii bavaria

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) OR (self education)) %((21 germany) OR (11 germany)) %13 bavaria %((ref history) OR (brief history))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22jews %((2f education) or (self education)) %((21 germany) OR (11 germany)) %13 bavaria %((ref history) or (brief history))%22".
• Adding a wildcard symbol may retrieve word variants: %22jews %((2f education) or (self education)) %((21 germany) OR (11 germany)) %13 bavaria %((ref history) or (brief history))%22*.