Perhaps you should try some spelling variations:
peris » petris (Expand Search), paris (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petruv » pentruv (Expand Search), peteruv (Expand Search), petrouv (Expand Search), peruv (Expand Search), petrov (Expand Search)
peteru » peter (Expand Search), peters (Expand Search)
peterv » peter (Expand Search), peters (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (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 ((peris OR ((petru OR peteru) OR peterv)) OR (petr OR ((petri OR petruv) OR petruv))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peris OR ((petru OR peteru) OR peterv)) OR (petr OR ((petri OR petruv) OR petruv))) o.s.*".