Perhaps you should try some spelling variations:
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petruui » peteruui (Expand Search), petriuui (Expand Search), petruuui (Expand Search)
petruooi » peteruooi (Expand Search), petriuooi (Expand Search), petruuooi (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search), petro (Expand Search)
petriuov » peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (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 (petruui OR petruooi)) OR (petriov OR (petrov OR petriuov))) _. s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petr OR (petruui OR petruooi)) OR (petriov OR (petrov OR petriuov))) _. s.*.