Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriiuuv » peteriiuuv (Expand Search), petriiiuuv (Expand Search), petruiiuuv (Expand Search)
petruuuiov » peteruuuiov (Expand Search), petriuuuiov (Expand Search), petruuuuiov (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petruou » peteruou (Expand Search), petriuou (Expand Search), petruuou (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 petriiov) OR petriiuuv) OR petruuuiov) OR ((petrou OR petruou) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruov OR petriiov) OR petriiuuv) OR petruuuiov) OR ((petrou OR petruou) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruov OR petriiov) OR petriiuuv) OR petruuuiov) OR ((petrou OR petruou) OR petr)) o.s.*.