Perhaps you should try some spelling variations:
petrooov » petrov (Expand Search), peterooov (Expand Search), petriooov (Expand Search), petruooov (Expand Search)
petroooov » peteroooov (Expand Search), petrioooov (Expand Search), petruoooov (Expand Search)
petriou » peteriou (Expand Search), petriiou (Expand Search), petruiou (Expand Search)
petroou » peteroou (Expand Search), petrioou (Expand Search), petruoou (Expand Search)
petriuoou » peteriuoou (Expand Search), petriiuoou (Expand Search), petruiuoou (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 petroooov) OR ((peteru OR (petriou OR (petroou OR petriuoou))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrooov OR petroooov) OR ((peteru OR (petriou OR (petroou OR petriuoou))) OR petr)) o.s.*".