Perhaps you should try some spelling variations:
pfad » pfade, pad, pfand
fad » fand
pefa » pena, pea
prufa » pruft, prufe, prusa, prufta, profa, rufa
pref » pre, prof
pruf » pruft, prof, ruf

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: (((pfad OR fad) OR pela) OR ((pefa OR (prufa OR pref)) OR (puf OR pruf))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((pfad OR fad) or pela) or ((pefa or (prufa or pref)) or (puf or pruf)))".
• Adding a wildcard symbol may retrieve word variants: (((pfad OR fad) or pela) or ((pefa or (prufa or pref)) or (puf or pruf)))*.