Perhaps you should try some spelling variations:
"fop petrov OR petri OR petr OR petruui OR peteriov OR petri OR petrov o.s.*" » "fop petro OR petri OR petr OR petruui OR peteriov OR petri OR petro o.s.*" (Expand Search), "fop peterov OR peteri OR peter OR peteruui OR peteriov OR peteri OR peterov o.s.*" (Expand Search), "fop petruov OR petrui OR petru OR petruuui OR peteriov OR petrui OR petruov o.s.*" (Expand Search), "fop petroov OR petroi OR petro OR petrouui OR peteriov OR petroi OR petroov 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 petri) OR ((petr OR petruui) OR ((peteriov OR petri) OR petrov))) o.s.*.