Perhaps you should try some spelling variations:
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petruiuiv (Expand Search)
petriiuiuo » peteriiuiuo (Expand Search), petriiiuiuo (Expand Search), petruiiuiuo (Expand Search)
petruiuiuo » peteruiuiuo (Expand Search), petriuiuiuo (Expand Search), petruuiuiuo (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (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 (((peteriv OR petriiv) OR petriuiv) OR (((petriiuiuo OR petruiuiuo) OR petruov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peteriv OR petriiv) OR petriuiv) OR (((petriiuiuo OR petruiuiuo) OR petruov) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peteriv OR petriiv) OR petriuiv) OR (((petriiuiuo OR petruiuiuo) OR petruov) OR petr)) o.s.*.