Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
petrooiv » petrov (Expand Search), peterooiv (Expand Search), petriooiv (Expand Search), petroooiv (Expand Search)
petroov » peteroov (Expand Search), petrioov (Expand Search), petrooov (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petroio (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (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 (((petroov OR peteroov) OR petrooiv) OR (((petrio OR peterio) OR petru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petroov OR peteroov) OR petrooiv) OR (((petrio OR peterio) OR petru) OR petr)) o.s.*".