Perhaps you should try some spelling variations:
peterov » petrov (Expand Search), peterv (Expand Search), petersv (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)
petrouoi » peterouoi (Expand Search), petroouoi (Expand Search), perouoi (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petero » peter (Expand Search), peters (Expand Search), petro (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 (perouv OR (peterov OR ((petr OR petru) OR ((petero OR (petrouoi OR perouoi)) OR petri)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (perouv OR (peterov OR ((petr OR petru) OR ((petero OR (petrouoi OR perouoi)) OR petri)))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (perouv OR (peterov OR ((petr OR petru) OR ((petero OR (petrouoi OR perouoi)) OR petri)))) o.s.*.