Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petruuuiv » peteruuuiv (Expand Search), petriuuuiv (Expand Search), petruuuuiv (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petruuui » peteruuui (Expand Search), petriuuui (Expand Search), petruuuui (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 ((petruov OR (petriv OR (peteruuiv OR petruuuiv))) OR ((petrui OR petruuui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR (petriv OR (peteruuiv OR petruuuiv))) OR ((petrui OR petruuui) OR petr)) o.s.*".