Perhaps you should try some spelling variations:
"fop petrov OR petrioiov OR petru OR petrio OR petr OR petri o.s.*" » "fop petro OR petrioiov OR petru OR petrio OR petr OR petri o.s.*" (Expand Search), "fop petrov OR petrioiov OR pentru OR petrio OR petr OR petri o.s.*" (Expand Search), "fop petrov OR petrisiov OR petru OR petris OR petr OR petri o.s.*" (Expand Search), "fop petrov OR petroiov OR petru OR petro OR petr OR petri o.s.*" (Expand Search), "fop peterov OR peterioiov OR peteru OR peterio OR peter OR peteri o.s.*" (Expand Search), "fop petroov OR petroioiov OR petrou OR petroio OR petro OR petroi o.s.*" (Expand Search), "fop perov OR perioiov OR peru 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 ((petrov OR petrioiov) OR ((petru OR petrio) OR (petr OR petri))) o.s.*.