Perhaps you should try some spelling variations:
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petruiuv (Expand Search)
petruiuv » peteruiuv (Expand Search), petriuiuv (Expand Search), petruuiuv (Expand Search)
petriuiu » peteriuiu (Expand Search), petriiuiu (Expand Search), petruiuiu (Expand Search)
petriiiu » peteriiiu (Expand Search), petriiiiu (Expand Search), petruiiiu (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (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 ((petriuv OR petruiuv) OR (((petriuiu OR petriiiu) OR petruo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuv OR petruiuv) OR (((petriuiu OR petriiiu) OR petruo) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriuv OR petruiuv) OR (((petriuiu OR petriiiu) OR petruo) OR petr)) o.s.*.