Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
petruuov » petrov (Expand Search), peteruuov (Expand Search), petruuuov (Expand Search), petrouuov (Expand Search)
peteroiv » petrov (Expand Search), peterdi (Expand Search)
petroov » peteroov (Expand Search), petruoov (Expand Search), petrooov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petroui » peteroui (Expand Search), petruoui (Expand Search), petrooui (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 ((((peteruov OR petruuov) OR petroov) OR peteroiv) OR ((petri OR petroui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peteruov OR petruuov) OR petroov) OR peteroiv) OR ((petri OR petroui) OR petr)) o.s.*".