Perhaps you should try some spelling variations:
"fop petrv OR peterv OR petri OR petrov OR peteruv OR peteruv OR petru OR petr o.s.*" » "fop peterv OR peterv OR peteri OR peterov OR peteruv OR peteruv OR peteru OR peter o.s.*" (Expand Search), "fop petrov OR peterv OR petroi OR petroov OR peteruv OR peteruv OR petrou OR petro o.s.*" (Expand Search), "fop perv OR peterv OR peri OR perov OR peteruv OR peteruv 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 ((petrv OR peterv) OR (petri OR (((petrov OR peteruv) OR peteruv) OR (petru OR petr)))) o.s.*.