Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriiiov » peteriiiov (Expand Search), petriiiiov (Expand Search), petruiiiov (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petruoiu (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((((petriu OR petroiu) OR petrou) OR peterouo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petriiiov) OR ((((petriu OR petroiu) OR petrou) OR peterouo) OR petr)) o.s.*".