Perhaps you should try some spelling variations:
"fop petruv OR petruo OR petri OR peri OR peri OR peteri OR petr o.s.*" » "fop petruv OR petruo OR petri OR per OR per OR peteri OR petr o.s.*" (Expand Search), "fop peteruv OR peteruo OR peteri OR peri OR peri OR peteri OR peter o.s.*" (Expand Search), "fop petruuv OR petruuo OR petrui OR peri OR peri OR peteri OR petru o.s.*" (Expand Search), "fop petrouv OR petrouo OR petroi OR peri OR peri 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 (petruv OR ((petruo OR (((petri OR peri) OR peri) OR peteri)) OR petr)) o.s.*.