Perhaps you should try some spelling variations:
"fop petrov OR petri OR petrui OR petru OR petruuo OR petr OR peter o.s.*" » "fop petro OR petri OR petrui OR petru OR petruuo OR petr OR peter o.s.*" (Expand Search), "fop petrov OR petri OR pentrui OR pentru OR pentruuo OR petr OR peter o.s.*" (Expand Search), "fop petroov OR petroi OR petroui OR petrou OR petrouuo OR petro OR peter o.s.*" (Expand Search), "fop perov OR peri OR perui OR peru OR peruuo OR per OR peter 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 (((petri OR petrui) OR (petru OR petruuo)) OR (petr OR peter))) o.s.*.