Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petre » petri (Expand Search), petro (Expand Search), petere (Expand Search), petrie (Expand Search), petroe (Expand Search)
petra » petri (Expand Search), petro (Expand Search), petera (Expand Search), petria (Expand Search), petroa (Expand Search)
peterv » peter (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search), pentru (Expand Search), petri (Expand Search)
peters » peter (Expand Search), petersen (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 (((((petre OR petra) OR peterv) OR petr) OR peters) OR petru)) OR peterdi) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR (((((petre OR petra) OR peterv) OR petr) OR peters) OR petru)) OR peterdi) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterov OR (((((petre OR petra) OR peterv) OR petr) OR peters) OR petru)) OR peterdi) o.s.*.