Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petruuuuiov » peteruuuuiov (Expand Search), petriuuuuiov (Expand Search), petruuuuuiov (Expand Search)
petriuou » peteriuou (Expand Search), petriiuou (Expand Search), petruiuou (Expand Search)
petruiiuou » peteruiiuou (Expand Search), petriuiiuou (Expand Search), petruuiiuou (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 petruv) OR petruuuuiov) OR ((petriuou OR petruiiuou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR petruv) OR petruuuuiov) OR ((petriuou OR petruiiuou) OR petr)) o.s.*".