Perhaps you should try some spelling variations:
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petroouo » peteroouo (Expand Search), petrioouo (Expand Search), petruoouo (Expand Search)
petrooouo » peterooouo (Expand Search), petriooouo (Expand Search), petruooouo (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 (petriov OR ((((petrou OR peterou) OR petruv) OR (petroouo OR petrooouo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((((petrou OR peterou) OR petruv) OR (petroouo OR petrooouo)) OR petr)) o.s.*".