Perhaps you should try some spelling variations:
peri » petri (Expand Search), per (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petruiuv (Expand Search)
petruo » peteruo (Expand Search), petriuo (Expand Search), petruuo (Expand Search)
petruio » peteruio (Expand Search), petriuio (Expand Search), petruuio (Expand Search)
petriuuio » peteriuuio (Expand Search), petriiuuio (Expand Search), petruiuuio (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 ((petriuv OR petriuv) OR (((petruo OR peri) OR (petruio OR petriuuio)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuv OR petriuv) OR (((petruo OR peri) OR (petruio OR petriuuio)) OR petr)) o.s.*".