Perhaps you should try some spelling variations:
petrouiv » petrov (Expand Search), peterouiv (Expand Search), petruouiv (Expand Search), petroouiv (Expand Search)
petriov » peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petruiiov » peteruiiov (Expand Search), petruuiiov (Expand Search), petrouiiov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (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 ((petriov OR petruiiov) OR ((((petri OR petruov) OR petrouiv) OR peteruo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriov OR petruiiov) OR ((((petri OR petruov) OR petrouiv) OR peteruo) OR petr)) o.s.*".