Perhaps you should try some spelling variations:
petruouv » petrov (Expand Search), peteruouv (Expand Search), petriuouv (Expand Search), petruuouv (Expand Search)
peteroov » petrov (Expand Search)
petriiiv » peteriiiv (Expand Search), petriiiiv (Expand Search), petruiiiv (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petriou » peteriou (Expand Search), petriiou (Expand Search), petruiou (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 ((petriiiv OR petruouv) OR ((((petrou OR petriou) OR peteroov) OR peteruuuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiiv OR petruouv) OR ((((petrou OR petriou) OR peteroov) OR peteruuuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiiv OR petruouv) OR ((((petrou OR petriou) OR peteroov) OR peteruuuo) OR petr)) o.s.*.