Perhaps you should try some spelling variations:
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petruuuuov » peteruuuuov (Expand Search), petriuuuuov (Expand Search), petruuuuuov (Expand Search)
petruuuuuov » peteruuuuuov (Expand Search), petriuuuuuov (Expand Search), petruuuuuuov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruuuo » peteruuuo (Expand Search), petriuuuo (Expand Search), petruuuuo (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 ((peteruov OR (petrov OR (petruuuuov OR petruuuuuov))) OR ((petroi OR petruuuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteruov OR (petrov OR (petruuuuov OR petruuuuuov))) OR ((petroi OR petruuuo) OR petr)) o.s.*".