Perhaps you should try some spelling variations:
petriiuv » peteriiuv (Expand Search), petriiiuv (Expand Search), petruiiuv (Expand Search)
petroiiuv » peteroiiuv (Expand Search), petrioiiuv (Expand Search), petruoiiuv (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search)
petriio » peteriio (Expand Search), petriiio (Expand Search), petruiio (Expand Search)
petruuiu » peteruuiu (Expand Search), petriuuiu (Expand Search), petruuuiu (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 ((petriiuv OR petroiiuv) OR (((petrou OR petriio) OR petruuiu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiuv OR petroiiuv) OR (((petrou OR petriio) OR petruuiu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiuv OR petroiiuv) OR (((petrou OR petriio) OR petruuiu) OR petr)) o.s.*.