Perhaps you should try some spelling variations:
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petruiuou » petriuiuou (Expand Search), petruuiuou (Expand Search), petrouiuou (Expand Search)
petruuou » petriuuou (Expand Search), petruuuou (Expand Search), petrouuou (Expand Search)
petroou » petrioou (Expand Search), petruoou (Expand Search), petrooou (Expand Search)
petrov » petriov (Expand Search), petruov (Expand Search), petroov (Expand Search), petro (Expand Search)
petriov » petriiov (Expand Search), petruiov (Expand Search), petroiov (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 peter) OR ((petruiuou OR petruuou) OR (petroou OR (petrov OR petriov)))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR peter) OR ((petruiuou OR petruuou) OR (petroou OR (petrov OR petriov)))) _. s.*.