Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
peteriov » petrov (Expand Search)
peru » petru (Expand Search), per (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petruiuiv (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 ((peteruov OR peteriov) OR ((((petruo OR peru) OR petriuo) OR petriuiv) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteruov OR peteriov) OR ((((petruo OR peru) OR petriuo) OR petriuiv) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteruov OR peteriov) OR ((((petruo OR peru) OR petriuo) OR petriuiv) OR petr)) o.s.*.