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)
petriu » peteriu (Expand Search), petruiu (Expand Search), petroiu (Expand Search), petru (Expand Search), petris (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)
petrooov » peterooov (Expand Search), petruooov (Expand Search), petroooov (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 petriu) OR (peteroou OR ((petrov OR petruov) OR petrooov)))) _. s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petr OR ((petri OR petriu) OR (peteroou OR ((petrov OR petruov) OR petrooov)))) _. s.*".