Perhaps you should try some spelling variations:
"fop petrov OR peterov OR petr OR pero OR petri OR petroi OR petero OR per o.s.*" » "fop petro OR peterov OR petr OR pero OR petri OR petroi OR petero OR per o.s.*" (Expand Search), "fop peterov OR peterov OR peter OR pero OR peteri OR peteroi OR petero OR per o.s.*" (Expand Search), "fop petruov OR peterov OR petru OR pero OR petrui OR petruoi OR petero OR per o.s.*" (Expand Search), "fop petroov OR peterov OR petro OR pero OR petroi OR petrooi OR petero OR per o.s.*" (Expand Search), "fop petrov OR peterov OR petr OR petro OR petri OR petroi OR petero OR per o.s.*" (Expand Search), "fop petrov OR peterov OR petr OR pro OR petri OR petroi OR petero OR per o.s.*" (Expand Search), "fop petrov OR peterov OR petr OR pero OR petri OR petro OR petero OR per o.s.*" (Expand Search), "fop petrov OR peterov OR petr OR pero OR petri OR petrow OR petero OR per o.s.*" (Expand Search), "fop petrov OR peterv OR petr OR pero OR petri OR petroi OR peter OR per o.s.*" (Expand Search), "fop petrov OR petersv OR petr OR pero OR petri OR petroi OR peters OR per o.s.*" (Expand Search), "fop petrov OR petrov OR petr OR pero OR petri OR petroi OR petro 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 ((petrov OR peterov) OR ((((petr OR pero) OR (petri OR petroi)) OR petero) OR per)) o.s.*.