Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petriuiov » peteriuiov (Expand Search), petruiuiov (Expand Search), petroiuiov (Expand Search)
petruiio » peteruiio (Expand Search), petruuiio (Expand Search), petrouiio (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petriuo » peteriuo (Expand Search), petruiuo (Expand Search), petroiuo (Expand Search)
petr » peter (Expand Search), petru (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 (petriuiov OR peteriuiov)) OR (((petruiio OR petri) OR petriuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR (petriuiov OR peteriuiov)) OR (((petruiio OR petri) OR petriuo) OR petr)) o.s.*".