Perhaps you should try some spelling variations:
petriv » petrov (Expand Search), peteriv (Expand Search), petroiv (Expand Search)
peteru » peter (Expand Search), peters (Expand Search)
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search)
petris » peteris (Expand Search), petrois (Expand Search)
petr » peter (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), peters (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 ((petriv OR petris) OR ((peteru OR petru) OR ((petr OR per) OR (peteri OR petri)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriv OR petris) OR ((peteru OR petru) OR ((petr OR per) OR (peteri OR petri)))) o.s.*".