Perhaps you should try some spelling variations:
peteruov » petrov (Expand Search)
petruuov » petrov (Expand Search), peteruuov (Expand Search), petriuuov (Expand Search), petruuuov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruuuoi » peteruuuoi (Expand Search), petriuuuoi (Expand Search), petruuuuoi (Expand Search)
petruuo » peteruuo (Expand Search), petriuuo (Expand Search), petruuuo (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 petruuov) OR (((petroi OR (peteruuoi OR petruuuoi)) OR petruuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteruov OR petruuov) OR (((petroi OR (peteruuoi OR petruuuoi)) OR petruuo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteruov OR petruuov) OR (((petroi OR (peteruuoi OR petruuuoi)) OR petruuo) OR petr)) o.s.*.