Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petrioiu » peterioiu (Expand Search), petriioiu (Expand Search), petruioiu (Expand Search)
petroou » peteroou (Expand Search), petrioou (Expand Search), petruoou (Expand Search)
petrooou » peterooou (Expand Search), petriooou (Expand Search), petruooou (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 (((petriu OR petrioiu) OR ((petroou OR petrooou) OR peterou)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR (((petriu OR petrioiu) OR ((petroou OR petrooou) OR peterou)) OR petr)) o.s.*".