Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petruiuv » peteruiuv (Expand Search), petriuiuv (Expand Search), petruuiuv (Expand Search)
petruiuo » peteruiuo (Expand Search), petriuiuo (Expand Search), petruuiuo (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (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 petriv) OR petruiuv) OR peteruuv) OR ((petruiuo OR petriio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriov OR petriv) OR petruiuv) OR peteruuv) OR ((petruiuo OR petriio) OR petr)) o.s.*".