Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petrou » petro (Expand Search), petrov (Expand Search), petrow (Expand Search), petriou (Expand Search), petroou (Expand Search), perou (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (Expand Search)
petru » petriu (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search), petri (Expand Search)
peterio » petrio (Expand Search), peterso (Expand Search)
peteri » petri (Expand Search), peters (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 ((petrou OR peterio) OR ((((petr OR petru) OR peter) OR peteri) OR peterdi))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR ((petrou OR peterio) OR ((((petr OR petru) OR peter) OR peteri) OR peterdi))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR ((petrou OR peterio) OR ((((petr OR petru) OR peter) OR peteri) OR peterdi))) o.s.*.