Perhaps you should try some spelling variations:
petriv » peteriv (Expand Search), petruiv (Expand Search), petroiv (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petruuo » peteruuo (Expand Search), petruuuo (Expand Search), petrouuo (Expand Search)
petruiu » peteruiu (Expand Search), petruuiu (Expand Search), petrouiu (Expand Search)
petriuiu » peteriuiu (Expand Search), petruiuiu (Expand Search), petroiuiu (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 ((petriv OR petruov) OR (((petri OR petruuo) OR ((petruiu OR petriuiu) OR per)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriv OR petruov) OR (((petri OR petruuo) OR ((petruiu OR petriuiu) OR per)) OR petr)) o.s.*".