Perhaps you should try some spelling variations:
"fop perov OR petro OR petru OR peru OR petriu OR periu OR peru OR per o.s.*" » "fop petrov OR petro OR petru OR peru OR petriu OR periu OR peru OR per o.s.*" (Expand Search), "fop perov OR petrov OR petru OR peru OR petriu OR periu OR peru OR per o.s.*" (Expand Search), "fop perov OR petri OR petru OR peru OR petriu OR periu OR peru OR per o.s.*" (Expand Search), "fop perov OR petr OR petru OR peru OR petriu OR periu 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 (perov OR ((petro OR (((petru OR peru) OR (petriu OR periu)) OR peru)) OR per)) o.s.*.