Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petrouuuov » peterouuuov (Expand Search), petruouuuov (Expand Search), petroouuuov (Expand Search)
petruuouuuov » peteruuouuuov (Expand Search), petruuuouuuov (Expand Search), petrouuouuuov (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 (((peterov OR peteroov) OR (petruov OR (petrouuuov OR petruuouuuov))) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterov OR peteroov) OR (petruov OR (petrouuuov OR petruuouuuov))) OR (petri OR petr)) o.s.*".