Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
peteroio » peterdi (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petroio » peteroio (Expand Search), petrioio (Expand Search), petruoio (Expand Search)
petruiio » peteruiio (Expand Search), petriuiio (Expand Search), petruuiio (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 ((peteriov OR petriv) OR ((((petroio OR peteroio) OR petruiio) OR petriiu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriov OR petriv) OR ((((petroio OR peteroio) OR petruiio) OR petriiu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteriov OR petriv) OR ((((petroio OR peteroio) OR petruiio) OR petriiu) OR petr)) o.s.*.