Perhaps you should try some spelling variations:
petriiuuv » peteriiuuv (Expand Search), petriiiuuv (Expand Search), petroiiuuv (Expand Search)
petruuiuuv » peteruuiuuv (Expand Search), petriuuiuuv (Expand Search), petrouuiuuv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriuio » peteriuio (Expand Search), petriiuio (Expand Search), petroiuio (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petrouo (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 ((petriiuuv OR petruuiuuv) OR (((petru OR petriuio) OR petruo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiuuv OR petruuiuuv) OR (((petru OR petriuio) OR petruo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiuuv OR petruuiuuv) OR (((petru OR petriuio) OR petruo) OR petr)) o.s.*.