Perhaps you should try some spelling variations:
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petroooi » peteroooi (Expand Search), petruoooi (Expand Search), petrooooi (Expand Search)
petrov » peterov (Expand Search), petruov (Expand Search), petroov (Expand Search), petro (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
peteri » peterdi (Expand Search), peter (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 ((petri OR peteri) OR petroooi)) OR (petrov OR petruov)) _. s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petr OR ((petri OR peteri) OR petroooi)) OR (petrov OR petruov)) _. s.*".