Perhaps you should try some spelling variations:
petruv » petru (Expand Search), petrov (Expand Search), peteruv (Expand Search), petruuv (Expand Search), petrouv (Expand Search)
peterv » peter (Expand Search), peters (Expand Search)
petruiiv » peteruiiv (Expand Search), petruuiiv (Expand Search), petrouiiv (Expand Search)
petroio » peteroio (Expand Search), petruoio (Expand Search), petrooio (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 (((petruv OR petruiiv) OR peterv) OR ((petroio OR peteruo) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruv OR petruiiv) OR peterv) OR ((petroio OR peteruo) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruv OR petruiiv) OR peterv) OR ((petroio OR peteruo) OR (petr OR petri))) o.s.*.