Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petruuuov » peteruuuov (Expand Search), petriuuuov (Expand Search), petruuuuov (Expand Search)
petruiuo » peteruiuo (Expand Search), petriuiuo (Expand Search), petruuiuo (Expand Search)
petriuiuo » peteriuiuo (Expand Search), petriiuiuo (Expand Search), petruiuiuo (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (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 peteriuov) OR petruuuov) OR (((petruiuo OR petriuiuo) OR petriio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruov OR peteriuov) OR petruuuov) OR (((petruiuo OR petriuiuo) OR petriio) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruov OR peteriuov) OR petruuuov) OR (((petruiuo OR petriuiuo) OR petriio) OR petr)) o.s.*.