Perhaps you should try some spelling variations:
petrouiv » petrov (Expand Search), peterouiv (Expand Search), petruouiv (Expand Search), petroouiv (Expand Search)
peteruov » petrov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petruuui » peteruuui (Expand Search), petruuuui (Expand Search), petrouuui (Expand Search)
petruuuui » peteruuuui (Expand Search), petruuuuui (Expand Search), petrouuuui (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 ((petrouiv OR peteruov) OR (((petri OR peteri) OR (petruuui OR petruuuui)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrouiv OR peteruov) OR (((petri OR peteri) OR (petruuui OR petruuuui)) OR petr)) o.s.*".