Perhaps you should try some spelling variations:
peru » petru (Expand Search), per (Expand Search)
peruov » petruov (Expand Search), perov (Expand Search)
peri » per (Expand Search)
petruuv » peteruuv (Expand Search), petruuuv (Expand Search), petrouuv (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrui » peterui (Expand Search), petruui (Expand Search), petroui (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 ((petruuv OR petruuv) OR ((((peru OR petri) OR (peri OR petrui)) OR peruov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuv OR petruuv) OR ((((peru OR petri) OR (peri OR petrui)) OR peruov) OR petr)) o.s.*".