Perhaps you should try some spelling variations:
"fop petriv OR petrio OR peteri OR petruo OR peter o.s.*" » "fop petri OR petrio OR peteri OR petruo OR peter o.s.*" (Expand Search), "fop petris OR petrio OR peteri OR petruo OR peter o.s.*" (Expand Search), "fop petrov OR petrio OR peteri OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petri OR peteri OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petris OR peteri OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petro OR peteri OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petrio OR peterdi OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petrio OR petri OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petrio OR peters OR petruo OR peter o.s.*" (Expand Search), "fop petriv OR petrio OR peteri OR petru OR peter o.s.*" (Expand Search), "fop petriv OR petrio OR peteri OR petro OR peter 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 (((petrio OR peteri) OR petruo) OR peter)) o.s.*.