Perhaps you should try some spelling variations:
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petriov » petriiov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petroiov » petrioiov (Expand Search), petruoiov (Expand Search), petrooiov (Expand Search)
petrov » petriov (Expand Search), petruov (Expand Search), petroov (Expand Search), petro (Expand Search)
petruov » petriuov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
peteri » peterdi (Expand Search), petri (Expand Search), peters (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((petr OR peter) OR peteri) OR ((petriov OR (petroiov OR petrov)) OR petruov)) _. s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petr OR peter) OR peteri) OR ((petriov OR (petroiov OR petrov)) OR petruov)) _. s.*".