Perhaps you should try some spelling variations:
"fop petrov OR petruuov OR petro OR pero OR peri OR petero OR petruo OR petr o.s.*" » "fop petriv OR petruuov OR petri OR pero OR peri OR petero OR petruo OR petr o.s.*" (Expand Search), "fop petruv OR petruuov OR petru OR pero OR peri OR petero OR petruo OR petr o.s.*" (Expand Search), "fop petrov OR petruuov OR petro OR pero OR petri OR petero OR petruo OR petr o.s.*" (Expand Search), "fop petrov OR petruuov OR petro OR pero OR per OR petero OR petruo OR petr o.s.*" (Expand Search), "fop peterov OR peteruuov OR petero OR pero OR peri OR petero OR peteruo OR peter o.s.*" (Expand Search), "fop petriov OR petriuuov OR petrio OR pero OR peri OR petero OR petriuo OR petri o.s.*" (Expand Search), "fop petruov OR petruuuov OR petruo OR pero OR peri OR petero OR petruuo 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 ((petrov OR petruuov) OR (((((petro OR pero) OR peri) OR petero) OR petruo) OR petr)) o.s.*.