Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petriiiov » peteriiiov (Expand Search), petriiiiov (Expand Search), petroiiiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrioou » peterioou (Expand Search), petriioou (Expand Search), petroioou (Expand Search)
petrouo » peterouo (Expand Search), petriouo (Expand Search), petroouo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)

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 petriiiov) OR ((((petru OR peterioiu) OR petrioou) OR petrouo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petriiiov) OR ((((petru OR peterioiu) OR petrioou) OR petrouo) OR petr)) o.s.*".