Perhaps you should try some spelling variations:
"fop petriov OR petrov OR perov OR petro OR petri OR petriuo OR petr o.s.*" » "fop petriov OR petruv OR perov OR petru OR petri OR petriuo OR petr o.s.*" (Expand Search), "fop peteriov OR peterov OR perov OR petero OR peteri OR peteriuo OR peter o.s.*" (Expand Search), "fop petruiov OR petruov OR perov OR petruo OR petrui OR petruiuo OR petru o.s.*" (Expand Search), "fop periov OR perov OR perov OR pero OR peri OR periuo OR per 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 ((petriov OR (petrov OR perov)) OR (((petro OR petri) OR petriuo) OR petr)) o.s.*.