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