Perhaps you should try some spelling variations:
"fop peteriv OR petri OR petruv OR petru OR petr OR peterov OR petruv OR petru o.s.*" » "fop peteriv OR petri OR petrov OR petru OR petr OR peterov OR petrov OR petru o.s.*" (Expand Search), "fop peteriv OR petri OR pentruv OR pentru OR petr OR peterov OR pentruv OR pentru o.s.*" (Expand Search), "fop peteriv OR peteri OR peteruv OR peteru OR peter OR peterov OR peteruv OR peteru o.s.*" (Expand Search), "fop peteriv OR petroi OR petrouv OR petrou OR petro OR peterov OR petrouv OR petrou o.s.*" (Expand Search), "fop peteriv OR peri OR peruv OR peru OR per OR peterov OR peruv OR peru o.s.*" (Expand Search), "fop peteriv OR petri OR petruv OR petru OR petr OR petrov OR petruv OR petru 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 (((peteriv OR petri) OR (petruv OR petru)) OR (petr OR (peterov OR (petruv OR petru)))) o.s.*.