Perhaps you should try some spelling variations:
"fop petruv OR petrov OR petriv OR petru OR petruov OR peters OR petr OR peter o.s.*" » "fop petruv OR petro OR petriv OR petru OR petruov OR peters OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petrov OR petri OR petru OR petruov OR peters OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petrov OR petris OR petru OR petruov OR peters OR petr OR peter o.s.*" (Expand Search), "fop pentruv OR petrov OR petriv OR pentru OR pentruov OR peters OR petr OR peter o.s.*" (Expand Search), "fop petriv OR petrov OR petriv OR petri OR petriov OR peters OR petr OR peter o.s.*" (Expand Search), "fop petruv OR petrov OR petriv OR petru OR petruov OR petersen OR petr OR peter o.s.*" (Expand Search), "fop petriuv OR petriov OR petriiv OR petriu OR petriuov OR peters OR petri OR peter o.s.*" (Expand Search), "fop petrouv OR petroov OR petroiv OR petrou OR petrouov OR peters OR petro OR peter o.s.*" (Expand Search), "fop peruv OR perov OR periv OR peru OR peruov OR peters OR per 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 petrov) OR petriv) OR (((petru OR petruov) OR peters) OR (petr OR peter))) o.s.*.