Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruioi » peteruioi (Expand Search), petriuioi (Expand Search), petruuioi (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petruuouo » peteruuouo (Expand Search), petriuuouo (Expand Search), petruuuouo (Expand Search)
petriooio » peteriooio (Expand Search), petriiooio (Expand Search), petruiooio (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 ((((petroi OR petruioi) OR (petruo OR petruuouo)) OR petriooio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((((petroi OR petruioi) OR (petruo OR petruuouo)) OR petriooio) OR petr)) o.s.*".