Perhaps you should try some spelling variations:
petriioiov » peteriioiov (Expand Search), petriiioiov (Expand Search), petruiioiov (Expand Search)
petriuiioiov » peteriuiioiov (Expand Search), petriiuiioiov (Expand Search), petruiuiioiov (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petriiiu » peteriiiu (Expand Search), petriiiiu (Expand Search), petruiiiu (Expand Search)
petrioiu » peterioiu (Expand Search), petriioiu (Expand Search), petruioiu (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 ((petriioiov OR petriuiioiov) OR ((petrou OR (petriiiu OR petrioiu)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriioiov OR petriuiioiov) OR ((petrou OR (petriiiu OR petrioiu)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriioiov OR petriuiioiov) OR ((petrou OR (petriiiu OR petrioiu)) OR petr)) o.s.*.