Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petriov » petrov (Expand Search), peteriov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petrv » petrov (Expand Search), petro (Expand Search), petra (Expand Search), peterv (Expand Search), perv (Expand Search)
peterv » peter (Expand Search), peters (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((peterov OR petriov) OR (petrv OR peterv)) OR ((petr OR petru) OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterov OR petriov) OR (petrv OR peterv)) OR ((petr OR petru) OR petri)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((peterov OR petriov) OR (petrv OR peterv)) OR ((petr OR petru) OR petri)) o.s.*.