Perhaps you should try some spelling variations:
petriow » petrow (Expand Search), peteriow (Expand Search), petriiow (Expand Search), petruiow (Expand Search)
petruuvw » peteruuvw (Expand Search), petriuuvw (Expand Search), petruuuvw (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)
petris » peteris (Expand Search), petriis (Expand Search), petruis (Expand Search), petri (Expand Search)
petriis » peteriis (Expand Search), petriiis (Expand Search), petruiis (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 (((petriow OR (peteruvw OR petruuvw)) o) OR (((petr OR peterov) OR (petris OR petriis)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriow OR (peteruvw OR petruuvw)) o) OR (((petr OR peterov) OR (petris OR petriis)) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petriow OR (peteruvw OR petruuvw)) o) OR (((petr OR peterov) OR (petris OR petriis)) _)). s.*.