Perhaps you should try some spelling variations:
peterow » petrow (Expand Search)
petruow » petrow (Expand Search), peteruow (Expand Search), petruuow (Expand Search), petrouow (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petroiuo » peteroiuo (Expand Search), petruoiuo (Expand Search), petrooiuo (Expand Search)
petroui » peteroui (Expand Search), petruoui (Expand Search), petrooui (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((((peterow OR petruow) OR (petr OR petri)) o) OR ((petroiuo OR (petroui OR peterdi)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peterow OR petruow) OR (petr OR petri)) o) OR ((petroiuo OR (petroui OR peterdi)) _)). s.*".