Perhaps you should try some spelling variations:
petrioov » petrov (Expand Search), peterioov (Expand Search), petriioov (Expand Search), petroioov (Expand Search)
peteriiv » peterdi (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petroou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (((petrioov OR petriov) OR peteriiv) OR (((petru OR petrou) OR peterou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petrioov OR petriov) OR peteriiv) OR (((petru OR petrou) OR peterou) OR petr)) o.s.*".