Perhaps you should try some spelling variations:
petr » petro (Expand Search), per (Expand Search)
petru » petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petrui » petroui (Expand Search), perui (Expand Search), pentrui (Expand Search)
petri » petroi (Expand Search), peri (Expand Search)
petroi » petrooi (Expand Search), peroi (Expand Search), petro (Expand Search), petrov (Expand Search), petrow (Expand Search)
petrooi » petroooi (Expand Search), perooi (Expand Search)
peteroi » peterdi (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 petru) OR ((petrui OR petri) OR ((petroi OR petrooi) OR peteroi))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop (((petr OR peter) OR petru) OR ((petrui OR petri) OR ((petroi OR petrooi) OR peteroi))) _. s.*.