Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
petrooov » petrov (Expand Search), peterooov (Expand Search), petriooov (Expand Search), petruooov (Expand Search)
petruoov » petrov (Expand Search), peteruoov (Expand Search), petriuoov (Expand Search), petruuoov (Expand Search)
peteroiv » petrov (Expand Search), peterdi (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((((peteruov OR peterov) OR (petrooov OR petruoov)) OR peteroiv) OR (petroi OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peteruov OR peterov) OR (petrooov OR petruoov)) OR peteroiv) OR (petroi OR petr)) o.s.*".