Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriiuiov » peteriiuiov (Expand Search), petriiiuiov (Expand Search), petruiiuiov (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petruuuiu » peteruuuiu (Expand Search), petriuuuiu (Expand Search), petruuuuiu (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 ((petruov OR petriiuiov) OR ((((petruo OR petrio) OR peterdi) OR petruuuiu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR petriiuiov) OR ((((petruo OR petrio) OR peterdi) OR petruuuiu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruov OR petriiuiov) OR ((((petruo OR petrio) OR peterdi) OR petruuuiu) OR petr)) o.s.*.