Perhaps you should try some spelling variations:
petruow » petrow (Expand Search), peteruow (Expand Search), petriuow (Expand Search), petruuow (Expand Search)
petruw » petru (Expand Search), petrow (Expand Search), peteruw (Expand Search), petriuw (Expand Search), petruuw (Expand Search)
petriuw » peteriuw (Expand Search), petriiuw (Expand Search), petruiuw (Expand Search)
petriuuw » peteriuuw (Expand Search), petriiuuw (Expand Search), petruiuuw (Expand Search)
petrivw » peterivw (Expand Search), petriivw (Expand Search), petruivw (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((((petruow OR ((petruw OR petriuw) OR petriuuw)) OR petrivw) o) OR ((petr OR peterov) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruow OR ((petruw OR petriuw) OR petriuuw)) OR petrivw) o) OR ((petr OR peterov) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruow OR ((petruw OR petriuw) OR petriuuw)) OR petrivw) o) OR ((petr OR peterov) _)). s.*.