Perhaps you should try some spelling variations:
petriv » peteriv (Expand Search), petriiv (Expand Search), petroiv (Expand Search)
petruiiiv » peteruiiiv (Expand Search), petriuiiiv (Expand Search), petrouiiiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petrooi (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petr » peter (Expand Search), petri (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 ((((petriv OR periv) OR petruiiiv) OR petriov) OR ((petroi OR petru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriv OR periv) OR petruiiiv) OR petriov) OR ((petroi OR petru) OR petr)) o.s.*".