Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
petriuou » peteriuou (Expand Search), petriiuou (Expand Search), petruiuou (Expand Search)
petruuuou » peteruuuou (Expand Search), petriuuuou (Expand Search), petruuuuou (Expand Search)
petrioi » peterioi (Expand Search), petriioi (Expand Search), petruioi (Expand Search)
petruooi » peteruooi (Expand Search), petriuooi (Expand Search), petruuooi (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (peteruov OR ((((petriuou OR peteruou) OR petruuuou) OR (petrioi OR petruooi)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peteruov OR ((((petriuou OR peteruou) OR petruuuou) OR (petrioi OR petruooi)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peteruov OR ((((petriuou OR peteruou) OR petruuuou) OR (petrioi OR petruooi)) OR petr)) o.s.*.