Perhaps you should try some spelling variations:
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petroou » petruoou (Expand Search), petrooou (Expand Search), peroou (Expand Search)
petriou » petruiou (Expand Search), petroiou (Expand Search), periou (Expand Search)
petrov » petruov (Expand Search), petroov (Expand Search), perov (Expand Search), petro (Expand Search)
petriiov » petruiiov (Expand Search), petroiiov (Expand Search), periiov (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 (petri OR ((petroou OR petriou) OR (petrov OR petriiov)))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR peter) OR (petri OR ((petroou OR petriou) OR (petrov OR petriiov)))) _. s.*.