Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petriiu » peteriiu (Expand Search), petriiiu (Expand Search), petruiiu (Expand Search)
petruiu » peteruiu (Expand Search), petriuiu (Expand Search), petruuiu (Expand Search)
petriuiu » peteriuiu (Expand Search), petriiuiu (Expand Search), petruiuiu (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 ((petrou OR (petriiu OR (petruiu OR petriuiu))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((petrou OR (petriiu OR (petruiu OR petriuiu))) OR petr)) o.s.*".