Perhaps you should try some spelling variations:
"fop petriv OR peteriv OR petru OR petrov OR periov OR petro OR petr o.s.*" » "fop petriv OR peteriv OR petru OR petriv OR periov OR petri OR petr o.s.*" (Expand Search), "fop peteriv OR peteriv OR peteru OR peterov OR periov OR petero OR peter o.s.*" (Expand Search), "fop petriiv OR peteriv OR petriu OR petriov OR periov OR petrio OR petri o.s.*" (Expand Search), "fop periv OR peteriv OR peru OR perov OR periov OR pero OR per 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 ((petriv OR peteriv) OR ((petru OR (petrov OR periov)) OR (petro OR petr))) o.s.*.