Perhaps you should try some spelling variations:
"fop petruov OR petriov OR petruo OR petruo OR petr OR petru OR peter o.s.*" » "fop petrov OR petriov OR petruo OR petruo OR petr OR petru OR peter o.s.*" (Expand Search), "fop petruov OR petrov OR petruo OR petruo OR petr OR petru OR peter o.s.*" (Expand Search), "fop petrov OR petriov OR petro OR petro OR petr OR petru OR peter o.s.*" (Expand Search), "fop petriuov OR petriiov OR petriuo OR petriuo OR petri OR petriu OR peter o.s.*" (Expand Search), "fop petrouov OR petroiov OR petrouo OR petrouo OR petro OR petrou OR peter o.s.*" (Expand Search), "fop peruov OR periov OR peruo OR peruo OR per OR peru OR peter o.s.*" (Expand Search), "fop pentruov OR petriov OR pentruo OR pentruo OR petr OR pentru OR peter o.s.*" (Expand Search), "fop petriov OR petriov OR petrio OR petrio OR petr OR petri 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 ((petruov OR petriov) OR ((petruo OR petruo) OR ((petr OR petru) OR peter))) o.s.*.