Perhaps you should try some spelling variations:
petris » petri (Expand Search), petriis (Expand Search), petruis (Expand Search), petrois (Expand Search)
petruiv » petriuiv (Expand Search), petruuiv (Expand Search), petrouiv (Expand Search)
petroiuiv » petrioiuiv (Expand Search), petruoiuiv (Expand Search), petrooiuiv (Expand Search)
petruio » petriuio (Expand Search), petruuio (Expand Search), petrouio (Expand Search)
petrioio » petriioio (Expand Search), petruioio (Expand Search), petroioio (Expand Search)
petr » petri (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 ((petruiv OR petroiuiv) OR (((petruio OR petrioio) OR petris) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR petroiuiv) OR (((petruio OR petrioio) OR petris) OR (petr OR peter))) o.s.*".