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