Perhaps you should try some spelling variations:
petrov » peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petruiiov » peteruiiov (Expand Search), petruuiiov (Expand Search), petrouiiov (Expand Search)
petriv » peteriv (Expand Search), petruiv (Expand Search), petroiv (Expand Search)
petruouiv » peteruouiv (Expand Search), petruuouiv (Expand Search), petrououiv (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 (((petrov OR petruiiov) OR (petriv OR petruouiv)) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petrov OR petruiiov) OR (petriv OR petruouiv)) OR (petri OR petr)) o.s.*".