Perhaps you should try some spelling variations:
petriv » peteriv (Expand Search), petriiv (Expand Search), petroiv (Expand Search)
petrioio » peterioio (Expand Search), petriioio (Expand Search), petroioio (Expand Search)
petroiio » peteroiio (Expand Search), petrioiio (Expand Search), petrooiio (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petrooiu (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 ((peteriiov OR petriv) OR (((petrioio OR petroiio) OR (petru OR petroiu)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriiov OR petriv) OR (((petrioio OR petroiio) OR (petru OR petroiu)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((peteriiov OR petriv) OR (((petrioio OR petroiio) OR (petru OR petroiu)) OR petr)) o.s.*.