Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petriio » peteriio (Expand Search), petruiio (Expand Search), petroiio (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrooiuo » peterooiuo (Expand Search), petruooiuo (Expand Search), petroooiuo (Expand Search)
petrouoiuo » peterouoiuo (Expand Search), petruouoiuo (Expand Search), petroouoiuo (Expand Search)
petr » peter (Expand Search), petru (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 peteriuiov) OR (((petriio OR petri) OR (petrooiuo OR petrouoiuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR peteriuiov) OR (((petriio OR petri) OR (petrooiuo OR petrouoiuo)) OR petr)) o.s.*".