Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petriuuo » peteriuuo (Expand Search), petriiuuo (Expand Search), petruiuuo (Expand Search)
petruiiiiuuo » peteruiiiiuuo (Expand Search), petriuiiiiuuo (Expand Search), petruuiiiiuuo (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 ((petriiov OR petruov) OR (((petriuo OR peteruo) OR (petriuuo OR petruiiiiuuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR petruov) OR (((petriuo OR peteruo) OR (petriuuo OR petruiiiiuuo)) OR petr)) o.s.*".