Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriv » petri (Expand Search), petris (Expand Search), petrov (Expand Search), peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
peterv » peter (Expand Search), peters (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petruoiu (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (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 (((petruov OR periuv) OR (petriv OR peterv)) OR (((petr OR peteri) OR petroiu) OR per)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruov OR periuv) OR (petriv OR peterv)) OR (((petr OR peteri) OR petroiu) OR per)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruov OR periuv) OR (petriv OR peterv)) OR (((petr OR peteri) OR petroiu) OR per)) o.s.*.