Perhaps you should try some spelling variations:
"fop petriv OR petris OR petruuiv OR peruiv OR peter OR peter OR petr OR petri o.s.*" » "fop petrov OR petris OR petruuiv OR peruiv OR peter OR peter OR petr OR petri o.s.*" (Expand Search), "fop petruiv OR petruis OR petruuuiv OR peruiv OR peter OR peter OR petru OR petrui o.s.*" (Expand Search), "fop petroiv OR petrois OR petrouuiv OR peruiv OR peter OR peter OR petro OR petroi o.s.*" (Expand Search), "fop periv OR peris OR peruuiv OR peruiv OR peter OR peter OR per OR peri 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 (((petriv OR petris) OR (petruuiv OR peruiv)) OR ((peter OR peter) OR (petr OR petri))) o.s.*.