Perhaps you should try some spelling variations:
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petruiuiv (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petruiiiu » peteruiiiu (Expand Search), petriuiiiu (Expand Search), petruuiiiu (Expand Search)
petruuiu » peteruuiu (Expand Search), petriuuiu (Expand Search), petruuuiu (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 ((peterov OR (petriv OR petriuiv)) OR (((petriu OR petruiiiu) OR petruuiu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR (petriv OR petriuiv)) OR (((petriu OR petruiiiu) OR petruuiu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterov OR (petriv OR petriuiv)) OR (((petriu OR petruiiiu) OR petruuiu) OR petr)) o.s.*.