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)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search), petri (Expand Search), petro (Expand Search), petrov (Expand Search)
peterio » petero (Expand Search), petrio (Expand Search), peterso (Expand Search)
peteri » peter (Expand Search), petri (Expand Search), peters (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 (peterio OR (petr OR (petroi OR (peteri OR peterdi))))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuv OR petruiuv) OR (peterio OR (petr OR (petroi OR (peteri OR peterdi))))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriuv OR petruiuv) OR (peterio OR (petr OR (petroi OR (peteri OR peterdi))))) o.s.*.