Perhaps you should try some spelling variations:
"fop petruv OR peruv OR petroi OR petruo OR petr OR peter o.s.*" » "fop petru OR peruv OR petroi OR petruo OR petr OR peter o.s.*" (Expand Search), "fop petrov OR peruv OR petroi OR petruo OR petr OR peter o.s.*" (Expand Search), "fop petruv OR peruv OR petri OR petruo OR petr OR peter o.s.*" (Expand Search), "fop petruv OR peruv OR petro OR petruo OR petr OR peter o.s.*" (Expand Search), "fop petruv OR peruv OR petrov OR petruo OR petr OR peter o.s.*" (Expand Search), "fop petruv OR peruv OR petroi OR petru OR petr OR peter o.s.*" (Expand Search), "fop petruv OR peruv OR petroi OR petro OR petr OR peter o.s.*" (Expand Search), "fop petriuv OR peruv OR petrioi OR petriuo OR petri OR peter o.s.*" (Expand Search), "fop petruuv OR peruv OR petruoi OR petruuo OR petru OR peter o.s.*" (Expand Search), "fop petrouv OR peruv OR petrooi OR petrouo OR petro OR peter 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 peruv) OR ((petroi OR petruo) OR (petr OR peter))) o.s.*.