Perhaps you should try some spelling variations:
"fop petrov OR peteriiov OR petroiv OR petruio OR petrouio OR petr OR petri o.s.*" » "fop petro OR peteriiov OR petroiv OR petruio OR petrouio OR petr OR petri o.s.*" (Expand Search), "fop peterov OR peteriiov OR peteroiv OR peteruio OR peterouio OR peter OR peteri o.s.*" (Expand Search), "fop petruov OR peteriiov OR petruoiv OR petruuio OR petruouio OR petru OR petrui o.s.*" (Expand Search), "fop petroov OR peteriiov OR petrooiv OR petrouio OR petroouio OR petro OR petroi 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 peteriiov) OR petroiv) OR ((petruio OR petrouio) OR (petr OR petri))) o.s.*.