Perhaps you should try some spelling variations:
"fop petruv OR petruuv OR petero OR petruio OR petriuuio OR peteriuuio OR petr o.s.*" » "fop peteruv OR peteruuv OR petero OR peteruio OR peteriuuio OR peteriuuio OR peter o.s.*" (Expand Search), "fop petriuv OR petriuuv OR petero OR petriuio OR petriiuuio OR peteriuuio OR petri o.s.*" (Expand Search), "fop petruuv OR petruuuv OR petero OR petruuio OR petruiuuio OR peteriuuio 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 ((petruv OR petruuv) OR ((petero OR (petruio OR (petriuuio OR peteriuuio))) OR petr)) o.s.*.