Perhaps you should try some spelling variations:
"fop periov OR petruv OR petrouv OR peruv OR peteriuv OR petru OR peri OR petr o.s.*" » "fop petriov OR petruv OR petrouv OR peruv OR peteriuv OR petru OR petri OR petr o.s.*" (Expand Search), "fop perov OR petruv OR petrouv OR peruv OR peteriuv OR petru OR per OR petr o.s.*" (Expand Search), "fop periov OR peteruv OR peterouv OR peruv OR peteriuv OR peteru OR peri OR peter o.s.*" (Expand Search), "fop periov OR petriuv OR petriouv OR peruv OR peteriuv OR petriu OR peri OR petri o.s.*" (Expand Search), "fop periov OR petrouv OR petroouv OR peruv OR peteriuv OR petrou OR peri OR petro 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 ((periov OR (((petruv OR petrouv) OR peruv) OR peteriuv)) OR ((petru OR peri) OR petr)) o.s.*.