Perhaps you should try some spelling variations:
"fop petruv OR petruuv OR peruov OR petru OR petriu OR perio OR petr OR petri o.s.*" » "fop petrov OR petruuv OR peruov OR petru OR petriu OR perio OR petr OR petri o.s.*" (Expand Search), "fop pentruv OR pentruuv OR peruov OR pentru OR petriu OR perio OR petr OR petri o.s.*" (Expand Search), "fop petruv OR petruuv OR peruov OR petru OR petris OR perio OR petr OR petri o.s.*" (Expand Search), "fop peteruv OR peteruuv OR peruov OR peteru OR peteriu OR perio OR peter OR peteri o.s.*" (Expand Search), "fop petrouv OR petrouuv OR peruov OR petrou OR petroiu OR perio OR petro OR petroi o.s.*" (Expand Search), "fop peruv OR peruuv OR peruov OR peru OR periu OR perio 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 (((petruv OR petruuv) OR peruov) OR (((petru OR petriu) OR perio) OR (petr OR petri))) o.s.*.