Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
peteruv » peterv (Expand Search), petruv (Expand Search), petersv (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
petruo » petru (Expand Search), petro (Expand Search), peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petrui » petri (Expand Search), petru (Expand Search), peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petruuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 peteruv) OR (((peteru OR (petruo OR petruuo)) OR petrui) OR (petr OR per))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterov OR peteruv) OR (((peteru OR (petruo OR petruuo)) OR petrui) OR (petr OR per))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterov OR peteruv) OR (((peteru OR (petruo OR petruuo)) OR petrui) OR (petr OR per))) o.s.*.