Perhaps you should try some spelling variations:
"fop peruv OR petruo OR petru OR petri OR petr OR petri OR petersen OR peterdi o.s.*" » "fop peruv OR petro OR petru OR petri OR petr OR petri OR petersen OR peterdi o.s.*" (Expand Search), "fop peruv OR pentruo OR pentru OR petri OR petr OR petri OR petersen OR peterdi o.s.*" (Expand Search), "fop peruv OR peteruo OR peteru OR peteri OR peter OR peteri OR petersen OR peterdi o.s.*" (Expand Search), "fop peruv OR petrouo OR petrou OR petroi OR petro OR petroi OR petersen OR peterdi o.s.*" (Expand Search), "fop peruv OR peruo OR peru OR peri OR per OR peri OR petersen OR peterdi o.s.*" (Expand Search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: fop (peruv OR ((petruo OR (petru OR petri)) OR (petr OR ((petri OR petersen) OR peterdi)))) o.s.*.