Perhaps you should try some spelling variations:
"fop peteriv OR petruiv OR peteruiv OR peri OR petri OR pero OR petrou OR petr o.s.*" » "fop peteriv OR petruiv OR peterdi OR peri OR petri OR pero OR petrou OR petr o.s.*" (Expand Search), "fop peteriv OR petruiv OR peteruiv OR per OR petri OR pero OR petrou OR petr o.s.*" (Expand Search), "fop peteriv OR peteruiv OR peteruiv OR peri OR peteri OR pero OR peterou OR peter o.s.*" (Expand Search), "fop peteriv OR petruuiv OR peteruiv OR peri OR petrui OR pero OR petruou OR petru o.s.*" (Expand Search), "fop peteriv OR petrouiv OR peteruiv OR peri OR petroi OR pero OR petroou 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 ((peteriv OR (petruiv OR peteruiv)) OR ((((peri OR petri) OR pero) OR petrou) OR petr)) o.s.*.