Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
petrooov » petrov (Expand Search), peterooov (Expand Search), petriooov (Expand Search), petruooov (Expand Search)
petroov » peteroov (Expand Search), petrioov (Expand Search), petruoov (Expand Search)
petruiou » peteruiou (Expand Search), petriuiou (Expand Search), petruuiou (Expand Search)
petrooiu » peterooiu (Expand Search), petriooiu (Expand Search), petruooiu (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 (((petroov OR peteroov) OR petrooov) OR (((petruiou OR petrooiu) OR peteru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petroov OR peteroov) OR petrooov) OR (((petruiou OR petrooiu) OR peteru) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petroov OR peteroov) OR petrooov) OR (((petruiou OR petrooiu) OR peteru) OR petr)) o.s.*.