Perhaps you should try some spelling variations:
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
petruo » petru (Expand Search), petro (Expand Search), peteruo (Expand Search), petruuo (Expand Search), petrouo (Expand Search)
petris » peteris (Expand Search), petruis (Expand Search), petrois (Expand Search)
petriiv » peteriiv (Expand Search), petruiiv (Expand Search), petroiiv (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 ((petris OR petriiv) OR ((((peteru OR petruo) OR petri) OR peterio) OR (petr OR per))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petris OR petriiv) OR ((((peteru OR petruo) OR petri) OR peterio) OR (petr OR per))) o.s.*".