Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petruiiv » peteruiiv (Expand Search), petriuiiv (Expand Search), petrouiiv (Expand Search)
petrv » peterv (Expand Search), petriv (Expand Search), petrov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petrouo (Expand Search)
petruiiuiuo » peteruiiuiuo (Expand Search), petriuiiuiuo (Expand Search), petrouiiuiuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (((petriov OR petruiiv) OR petrv) OR ((petru OR (petruo OR petruiiuiuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR petruiiv) OR petrv) OR ((petru OR (petruo OR petruiiuiuo)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriov OR petruiiv) OR petrv) OR ((petru OR (petruo OR petruiiuiuo)) OR petr)) o.s.*.