Perhaps you should try some spelling variations:
petroow » petrow (Expand Search), peteroow (Expand Search), petruoow (Expand Search), petrooow (Expand Search)
petruw » petru (Expand Search), petrow (Expand Search), peteruw (Expand Search), petruuw (Expand Search), petrouw (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petroov » peteroov (Expand Search), petruoov (Expand Search), petrooov (Expand Search), petrov (Expand Search)
petrouv » peterouv (Expand Search), petruouv (Expand Search), petroouv (Expand Search), petrov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 ((((petroow OR petruw) OR petervw) o) OR ((petr OR (petroov OR (petrouv OR petri))) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petroow OR petruw) OR petervw) o) OR ((petr OR (petroov OR (petrouv OR petri))) _)). s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petroow OR petruw) OR petervw) o) OR ((petr OR (petroov OR (petrouv OR petri))) _)). s.*.