Perhaps you should try some spelling variations:
petriivw » peteriivw (Expand Search), petriiivw (Expand Search), petruiivw (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petruiui (Expand Search)
petruu » peteruu (Expand Search), petriuu (Expand Search), petruuu (Expand Search), petru (Expand Search)
petrou » peterou (Expand Search), petriou (Expand Search), petruou (Expand Search), petru (Expand Search), petro (Expand Search), petrov (Expand Search)
peterov » petrov (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 ((petriivw o) OR (((petr OR peterov) OR ((petriui OR (petruu OR peteriuiu)) OR petrou)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriivw o) OR (((petr OR peterov) OR ((petriui OR (petruu OR peteriuiu)) OR petrou)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriivw o) OR (((petr OR peterov) OR ((petriui OR (petruu OR peteriuiu)) OR petrou)) _)). s.*.