Perhaps you should try some spelling variations:
"fop petrov OR petruov OR petriv OR pero OR petri OR peteri OR petr o.s.*" » "fop peterov OR peteruov OR peteriv OR pero OR peteri OR peteri OR peter o.s.*" (Expand Search), "fop petruov OR petruuov OR petruiv OR pero OR petrui OR peteri OR petru o.s.*" (Expand Search), "fop petroov OR petrouov OR petroiv OR pero OR petroi OR peteri OR petro 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 petruov) OR petriv) OR ((pero OR (petri OR peteri)) OR petr)) o.s.*.