Perhaps you should try some spelling variations:
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petroi » petrioi (Expand Search), petruoi (Expand Search), petrooi (Expand Search), petri (Expand Search), petro (Expand Search), petrov (Expand Search)
petrioi » petriioi (Expand Search), petruioi (Expand Search), petroioi (Expand Search)
petroui » petrioui (Expand Search), petruoui (Expand Search), petrooui (Expand Search)
petris » petriis (Expand Search), petruis (Expand Search), petrois (Expand Search), petri (Expand Search)
petrooi » petriooi (Expand Search), petruooi (Expand Search), petroooi (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 (((petroi OR petrioi) OR (petroui OR petris)) OR petrooi)) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR peter) OR (((petroi OR petrioi) OR (petroui OR petris)) OR petrooi)) _. s.*.