Perhaps you should try some spelling variations:
"fop petrov OR peterov OR peteri OR petrio OR petriuoio OR peteriuuuoio OR peter o.s.*" » "fop petro OR peterov OR peteri OR petrio OR petriuoio OR peteriuuuoio OR peter o.s.*" (Expand Search), "fop petrov OR peterov OR peterdi OR petrio OR petriuoio OR peterdiuuuoio OR peter o.s.*" (Expand Search), "fop petrov OR peterov OR petri OR petrio OR petriuoio OR petriuuuoio OR peter o.s.*" (Expand Search), "fop petrov OR peterov OR peters OR petrio OR petriuoio OR petersuuuoio OR peter o.s.*" (Expand Search), "fop petrov OR peterov OR peteri OR petri OR petriuoio OR peteriuuuoio OR peter o.s.*" (Expand Search), "fop petrov OR peterov OR peteri OR petris OR petriuoio OR peteriuuuoio OR peter o.s.*" (Expand Search), "fop petrov OR peterov OR peteri OR petro OR petriuoio OR peteriuuuoio 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 peterov) OR ((peteri OR (petrio OR (petriuoio OR peteriuuuoio))) OR peter)) o.s.*.