Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petruuuo » peteruuuo (Expand Search), petriuuuo (Expand Search), petruuuuo (Expand Search)
petruuuuo » peteruuuuo (Expand Search), petriuuuuo (Expand Search), petruuuuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

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 petriv) OR (((petriuo OR peteriiuo) OR (petruuuo OR petruuuuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR petriv) OR (((petriuo OR peteriiuo) OR (petruuuo OR petruuuuo)) OR petr)) o.s.*".