Perhaps you should try some spelling variations:
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petroiiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrouo » peterouo (Expand Search), petriouo (Expand Search), petroouo (Expand Search)
petroioov » peteroioov (Expand Search), petrioioov (Expand Search), petrooioov (Expand Search)
petrouv » peterouv (Expand Search), petriouv (Expand Search), petroouv (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (petriiv OR (((petru OR petrouo) OR (petroioov OR (petrouv OR petrouv))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriiv OR (((petru OR petrouo) OR (petroioov OR (petrouv OR petrouv))) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petriiv OR (((petru OR petrouo) OR (petroioov OR (petrouv OR petrouv))) OR petr)) o.s.*.