Perhaps you should try some spelling variations:
"fop petrov OR petriuv OR petruov OR petero OR peteriu OR petriuo OR petr o.s.*" » "fop peterov OR peteriuv OR peteruov OR petero OR peteriu OR peteriuo OR peter o.s.*" (Expand Search), "fop petriov OR petriiuv OR petriuov OR petero OR peteriu OR petriiuo OR petri o.s.*" (Expand Search), "fop petruov OR petruiuv OR petruuov OR petero OR peteriu OR petruiuo OR petru 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 ((petrov OR petriuv) OR ((((petruov OR petero) OR peteriu) OR petriuo) OR petr)) o.s.*.