Perhaps you should try some spelling variations:
"fop petrov OR peteruiov OR peteriov OR petruiv OR petriiv OR petri OR petr o.s.*" » "fop peterov OR peteruiov OR peteriov OR peteruiv OR peteriiv OR peteri OR peter o.s.*" (Expand Search), "fop petruov OR peteruiov OR peteriov OR petruuiv OR petruiiv OR petrui OR petru o.s.*" (Expand Search), "fop petroov OR peteruiov OR peteriov OR petrouiv OR petroiiv OR petroi 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 peteruiov) OR peteriov) OR (petruiv OR petriiv)) OR (petri OR petr)) o.s.*.