Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petruuiv (Expand Search)
petriiuiv » peteriiuiv (Expand Search), petriiiuiv (Expand Search), petruiiuiv (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petruuiov » peteruuiov (Expand Search), petriuuiov (Expand Search), petruuuiov (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 ((petruiv OR petriiuiv) OR (((petroi OR petriuo) OR (petruuiov OR peteriov)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR petriiuiv) OR (((petroi OR petriuo) OR (petruuiov OR peteriov)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiv OR petriiuiv) OR (((petroi OR petriuo) OR (petruuiov OR peteriov)) OR petr)) o.s.*.