Perhaps you should try some spelling variations:
"fop periiv OR petruiv OR peruiv OR petro OR pero OR petri OR peteri OR petr o.s.*" » "fop periiv OR petruiv OR peruiv OR petrov OR pero OR petri OR peteri OR petr o.s.*" (Expand Search), "fop periiv OR petruiv OR peruiv OR petru OR pero OR petri OR peteri OR petr o.s.*" (Expand Search), "fop periiv OR peteruiv OR peruiv OR petero OR pero OR peteri OR peteri OR peter o.s.*" (Expand Search), "fop periiv OR petruuiv OR peruiv OR petruo OR pero OR petrui OR peteri OR petru o.s.*" (Expand Search), "fop periiv OR peruiv OR peruiv OR pero OR pero OR peri OR peteri 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 ((periiv OR (petruiv OR peruiv)) OR (((petro OR pero) OR (petri OR peteri)) OR petr)) o.s.*.