Perhaps you should try some spelling variations:
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petruuiv (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petruiuiv (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petriuuov » peteriuuov (Expand Search), petriiuuov (Expand Search), petruiuuov (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 (((petriv OR petruiv) OR petriuiv) OR (((petruo OR petriuo) OR petriuuov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriv OR petruiv) OR petriuiv) OR (((petruo OR petriuo) OR petriuuov) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriv OR petruiv) OR petriuiv) OR (((petruo OR petriuo) OR petriuuov) OR petr)) o.s.*.