Perhaps you should try some spelling variations:
petriv » petris (Expand Search), petrov (Expand Search), peteriv (Expand Search), petruiv (Expand Search), petroiv (Expand Search)
petero » peter (Expand Search), peters (Expand Search), petro (Expand Search)
petruuiv » peteruuiv (Expand Search), petruuuiv (Expand Search), petrouuiv (Expand Search)
petruuuiv » peteruuuiv (Expand Search), petruuuuiv (Expand Search), petrouuuiv (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 (petruuiv OR petruuuiv)) OR ((petero OR petero) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriv OR (petruuiv OR petruuuiv)) OR ((petero OR petero) OR (petr OR petri))) o.s.*".