Perhaps you should try some spelling variations:
"fop perv OR peterv OR petriov OR petruv OR peteru OR peteri OR petr o.s.*" » "fop per OR peterv OR petriov OR petruv OR peteru OR peteri OR petr o.s.*" (Expand Search), "fop perv OR peterv OR peteriov OR peteruv OR peteru OR peteri OR peter o.s.*" (Expand Search), "fop perv OR peterv OR petriiov OR petriuv OR peteru OR peteri OR petri o.s.*" (Expand Search), "fop perv OR peterv OR petruiov OR petruuv OR peteru OR peteri OR petru 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 ((perv OR peterv) OR ((petriov OR petruv) OR ((peteru OR peteri) OR petr))) o.s.*.