Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
petruoov » petrov (Expand Search), peteruoov (Expand Search), petriuoov (Expand Search), petruuoov (Expand Search)
petruooov » peteruooov (Expand Search), petriuooov (Expand Search), petruuooov (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petruuiv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((peteroov OR ((petruooov OR peterooov) OR petruoov)) OR petruiv) OR (petroi OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peteroov OR ((petruooov OR peterooov) OR petruoov)) OR petruiv) OR (petroi OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peteroov OR ((petruooov OR peterooov) OR petruoov)) OR petruiv) OR (petroi OR petr)) o.s.*.