Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petroiuo (Expand Search)
petrouuo » peterouuo (Expand Search), petriouuo (Expand Search), petroouuo (Expand Search)
petroouuuo » peteroouuuo (Expand Search), petrioouuuo (Expand Search), petrooouuuo (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 (((petru OR (petriuo OR peteriuo)) OR (petrouuo OR petroouuuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR (((petru OR (petriuo OR peteriuo)) OR (petrouuo OR petroouuuo)) OR petr)) o.s.*".