Perhaps you should try some spelling variations:
petrooov » petrov (Expand Search), peterooov (Expand Search), petriooov (Expand Search), petruooov (Expand Search)
petruuooov » peteruuooov (Expand Search), petriuuooov (Expand Search), petruuuooov (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petriuou » peteriuou (Expand Search), petriiuou (Expand Search), petruiuou (Expand Search)
petroou » peteroou (Expand Search), petrioou (Expand Search), petruoou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((petrooov OR petruuooov) OR (((petriu OR peteriu) OR (petriuou OR petroou)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrooov OR petruuooov) OR (((petriu OR peteriu) OR (petriuou OR petroou)) OR petr)) o.s.*".