Perhaps you should try some spelling variations:
peterv » peter (Expand Search), peters (Expand Search)
petruov » petrov (Expand Search), peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
petriu » petru (Expand Search), petris (Expand Search), peteriu (Expand Search), petruiu (Expand Search), petroiu (Expand Search)
petriiu » peteriiu (Expand Search), petruiiu (Expand Search), petroiiu (Expand Search)
petriou » peteriou (Expand Search), petruiou (Expand Search), petroiou (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 ((peterv OR petruov) OR (((peteru OR (petriu OR petriiu)) OR petriou) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peterv OR petruov) OR (((peteru OR (petriu OR petriiu)) OR petriou) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peterv OR petruov) OR (((peteru OR (petriu OR petriiu)) OR petriou) OR (petr OR petri))) o.s.*.