Perhaps you should try some spelling variations:
petrooiv » petrov (Expand Search), peterooiv (Expand Search), petruooiv (Expand Search), petroooiv (Expand Search)
petruiv » peteruiv (Expand Search), petruuiv (Expand Search), petrouiv (Expand Search)
petriiv » peteriiv (Expand Search), petruiiv (Expand Search), petroiiv (Expand Search)
petruouiiv » peteruouiiv (Expand Search), petruuouiiv (Expand Search), petrououiiv (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 ((((petrooiv OR peteriv) OR petruiv) OR (petriiv OR petruouiiv)) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petrooiv OR peteriv) OR petruiv) OR (petriiv OR petruouiiv)) OR (petri OR petr)) o.s.*".