Perhaps you should try some spelling variations:
"fop petruov OR petriov OR petru OR petruv OR petr OR petri o.s.*" » "fop petrov OR petriov OR petru OR petruv OR petr OR petri o.s.*" (Expand Search), "fop petruov OR petrov OR petru OR petruv OR petr OR petri o.s.*" (Expand Search), "fop pentruov OR petriov OR pentru OR pentruv OR petr OR petri o.s.*" (Expand Search), "fop petruov OR petriov OR petru OR petrov OR petr OR petri o.s.*" (Expand Search), "fop peteruov OR peteriov OR peteru OR peteruv OR peter OR peteri o.s.*" (Expand Search), "fop petrouov OR petroiov OR petrou OR petrouv OR petro OR petroi o.s.*" (Expand Search), "fop peruov OR periov OR peru OR peruv 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 ((petruov OR petriov) OR ((petru OR petruv) OR (petr OR petri))) o.s.*.