Perhaps you should try some spelling variations:
f education » self education
tnf history » etf history, ref history, motif history
imf history » brief history
12 german » 2012 german
2 german » 3 german, 5 german

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 %((f education) OR (deaf education)) %((12 german) OR (2 german)) %_ bavaria %((tnf history) OR (imf history))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22jews %((f education) or (deaf education)) %((12 german) OR (2 german)) %_ bavaria %((tnf history) or (imf history))%22".
• Adding a wildcard symbol may retrieve word variants: %22jews %((f education) or (deaf education)) %((12 german) OR (2 german)) %_ bavaria %((tnf history) or (imf history))%22*.