Perhaps you should try some spelling variations:
petrouiv » petrov (Expand Search), peterouiv (Expand Search), petriouiv (Expand Search), petruouiv (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petruiuiv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruoi » peteruoi (Expand Search), petriuoi (Expand Search), petruuoi (Expand Search)
petrouoov » peterouoov (Expand Search), petriouoov (Expand Search), petruouoov (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 ((petriuiv OR petrouiv) OR (((petroi OR petruoi) OR (peterov OR petrouoov)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuiv OR petrouiv) OR (((petroi OR petruoi) OR (peterov OR petrouoov)) OR petr)) o.s.*".