Perhaps you should try some spelling variations:
petruv » pentruv (Expand Search), peteruv (Expand Search), petrouv (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search)
petruov » pentruov (Expand Search), peteruov (Expand Search), petrouov (Expand Search)
petrov » petro (Expand Search), peterov (Expand Search), petroov (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search)
petriov » peteriov (Expand Search), petroiov (Expand Search)
petr » peter (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 (petruv OR (((petri OR petru) OR ((petruov OR petrov) OR petriov)) OR (petr OR per))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petruv OR (((petri OR petru) OR ((petruov OR petrov) OR petriov)) OR (petr OR per))) o.s.*".