Perhaps you should try some spelling variations:
petrooiv » petrov (Expand Search), peterooiv (Expand Search), petruooiv (Expand Search), petroooiv (Expand Search)
petroov » peteroov (Expand Search), petruoov (Expand Search), petrooov (Expand Search)
petruiv » peteruiv (Expand Search), petruuiv (Expand Search), petrouiv (Expand Search)
petrouiov » peterouiov (Expand Search), petruouiov (Expand Search), petroouiov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 (((petroov OR ((petrooiv OR petrooiv) OR petruiv)) OR petrouiov) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petroov OR ((petrooiv OR petrooiv) OR petruiv)) OR petrouiov) OR (petri OR petr)) o.s.*".