Perhaps you should try some spelling variations:
"fop petruv OR petruuv OR peteruuv OR peteruiov OR petriiov OR petrov OR petr o.s.*" » "fop peteruv OR peteruuv OR peteruuv OR peteruiov OR peteriiov OR peterov OR peter o.s.*" (Expand Search), "fop petriuv OR petriuuv OR peteruuv OR peteruiov OR petriiiov OR petriov OR petri o.s.*" (Expand Search), "fop petruuv OR petruuuv OR peteruuv OR peteruiov OR petruiiov OR petruov OR petru 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 (((petruv OR (petruuv OR peteruuv)) OR (peteruiov OR petriiov)) OR (petrov OR petr)) o.s.*.