Perhaps you should try some spelling variations:
"fop petruv OR petruuv OR petroi OR petriov OR petr OR peter o.s.*" » "fop petru OR petruuv OR petroi OR petriov OR petr OR peter o.s.*" (Expand Search), "fop petrov OR petruuv OR petroi OR petriov OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petruuv OR petri OR petriov OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petruuv OR petro OR petriov OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petruuv OR petrov OR petriov OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petruuv OR petroi OR petrov OR petr OR peter o.s.*" (Expand Search), "fop petriuv OR petriuuv OR petrioi OR petriiov OR petri OR peter o.s.*" (Expand Search), "fop petruuv OR petruuuv OR petruoi OR petruiov OR petru OR peter o.s.*" (Expand Search), "fop petrouv OR petrouuv OR petrooi OR petroiov 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 petruuv) OR ((petroi OR petriov) OR (petr OR peter))) o.s.*.