Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrioiov » peterioiov (Expand Search), petriioiov (Expand Search), petruioiov (Expand Search)
petriiiov » peteriiiov (Expand Search), petriiiiov (Expand Search), petruiiiov (Expand Search)
petriooiiov » peteriooiiov (Expand Search), petriiooiiov (Expand Search), petruiooiiov (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petrioio » peterioio (Expand Search), petriioio (Expand Search), petruioio (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 ((petriov OR (petrioiov OR (petriiiov OR petriooiiov))) OR ((petrou OR petrioio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR (petrioiov OR (petriiiov OR petriooiiov))) OR ((petrou OR petrioio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriov OR (petrioiov OR (petriiiov OR petriooiiov))) OR ((petrou OR petrioio) OR petr)) o.s.*.