Perhaps you should try some spelling variations:
petris » petri (Expand Search), petriis (Expand Search), petrois (Expand Search), peris (Expand Search)
petriov » petrov (Expand Search), petriiov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petruiv » pentruiv (Expand Search), petriiv (Expand Search), petriuiv (Expand Search), petrouiv (Expand Search), peruiv (Expand Search)
petruuiv » pentruuiv (Expand Search), petriuiv (Expand Search), petriuuiv (Expand Search), petrouuiv (Expand Search), peruuiv (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), petriu (Expand Search), petrou (Expand Search), peru (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((petruiv OR petris) OR petruuiv) OR (((petriov OR petru) OR petr) OR peter)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruiv OR petris) OR petruuiv) OR (((petriov OR petru) OR petr) OR peter)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruiv OR petris) OR petruuiv) OR (((petriov OR petru) OR petr) OR peter)) o.s.*.