Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petroiuv » petrov (Expand Search), peteroiuv (Expand Search), petrioiuv (Expand Search), petrooiuv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrouo » peterouo (Expand Search), petriouo (Expand Search), petroouo (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petrouuo (Expand Search)
petr » peter (Expand Search), petri (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 ((peteriov OR petroiuv) OR (((petru OR peteroi) OR (petrouo OR petruuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriov OR petroiuv) OR (((petru OR peteroi) OR (petrouo OR petruuo)) OR petr)) o.s.*".