Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petruouv » petrov (Expand Search), peteruouv (Expand Search), petriuouv (Expand Search), petruuouv (Expand Search)
petruioov » peteruioov (Expand Search), petriuioov (Expand Search), petruuioov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petruuuo (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 (((petruioov OR peteriov) OR petruouv) OR ((petroi OR petruuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruioov OR peteriov) OR petruouv) OR ((petroi OR petruuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruioov OR peteriov) OR petruouv) OR ((petroi OR petruuo) OR petr)) o.s.*.