Perhaps you should try some spelling variations:
peru » petru (Expand Search), per (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriuuo » peteriuuo (Expand Search), petriiuuo (Expand Search), petruiuuo (Expand Search)
petriiuuo » peteriiuuo (Expand Search), petriiiuuo (Expand Search), petruiiuuo (Expand Search)
petruuiiuuo » peteruuiiuuo (Expand Search), petriuuiiuuo (Expand Search), petruuuiiuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 (petriov OR (((peteru OR peru) OR (petriuuo OR (petriiuuo OR petruuiiuuo))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR (((peteru OR peru) OR (petriuuo OR (petriiuuo OR petruuiiuuo))) OR petr)) o.s.*".