Perhaps you should try some spelling variations:
petrouov » petrov (Expand Search), peterouov (Expand Search), petriouov (Expand Search), petruouov (Expand Search)
peteroio » peterdi (Expand Search)
petroiiov » peteroiiov (Expand Search), petrioiiov (Expand Search), petruoiiov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriiu » peteriiu (Expand Search), petriiiu (Expand Search), petruiiu (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 ((petroiiov OR ((petrouov OR petriov) OR peterouov)) OR ((peteroio OR petriiu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroiiov OR ((petrouov OR petriov) OR peterouov)) OR ((peteroio OR petriiu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petroiiov OR ((petrouov OR petriov) OR peterouov)) OR ((peteroio OR petriiu) OR petr)) o.s.*.