Perhaps you should try some spelling variations:
petruoiv » petrov (Expand Search), peteruoiv (Expand Search), petriuoiv (Expand Search), petruuoiv (Expand Search)
peru » petru (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petroooi » peteroooi (Expand Search), petrioooi (Expand Search), petruoooi (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (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 (petruoiv OR (((((petroi OR petroooi) OR petriio) OR peteru) OR (peru OR per)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petruoiv OR (((((petroi OR petroooi) OR petriio) OR peteru) OR (peru OR per)) OR petr)) o.s.*".