Perhaps you should try some spelling variations:
petroiiov » peteroiiov (Expand Search), petrioiiov (Expand Search), petrooiiov (Expand Search)
petrioiov » peterioiov (Expand Search), petriioiov (Expand Search), petroioiov (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petroio (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petrooiu (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 ((petroiiov OR petrioiov) OR (((petrio OR petrio) OR (petru OR petroiu)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroiiov OR petrioiov) OR (((petrio OR petrio) OR (petru OR petroiu)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petroiiov OR petrioiov) OR (((petrio OR petrio) OR (petru OR petroiu)) OR petr)) o.s.*.