Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
peri » petri (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petrouuov » peterouuov (Expand Search), petriouuov (Expand Search), petruouuov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petroiv » peteroiv (Expand Search), petrioiv (Expand Search), petruoiv (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 (((petruov OR peteroov) OR petrouuov) OR (((petroi OR peri) OR petroiv) OR (per OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruov OR peteroov) OR petrouuov) OR (((petroi OR peri) OR petroiv) OR (per OR petr))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruov OR peteroov) OR petrouuov) OR (((petroi OR peri) OR petroiv) OR (per OR petr))) o.s.*.