Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
petrooiov » peterooiov (Expand Search), petriooiov (Expand Search), petroooiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petroiuv (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 ((petruov OR (petrooiov OR peteriov)) OR (((pero OR petru) OR petriuv) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR (petrooiov OR peteriov)) OR (((pero OR petru) OR petriuv) OR petr)) o.s.*".