Perhaps you should try some spelling variations:
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petriuou » peteriuou (Expand Search), petriiuou (Expand Search), petruiuou (Expand Search)
petruuou » peteruuou (Expand Search), petriuuou (Expand Search), petruuuou (Expand Search)
petroou » peteroou (Expand Search), petrioou (Expand Search), petruoou (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search), petro (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petr OR ((petriuou OR petruuou) OR (petroou OR (petrov OR petriov)))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop (petr OR ((petriuou OR petruuou) OR (petroou OR (petrov OR petriov)))) _. s.*.