Perhaps you should try some spelling variations:
petruoiv » petrov (Expand Search), peteruoiv (Expand Search), petriuoiv (Expand Search), petruuoiv (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petruoi » peteruoi (Expand Search), petriuoi (Expand Search), petruuoi (Expand Search)
petrooi » peterooi (Expand Search), petriooi (Expand Search), petruooi (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 ((petruoiv OR petruov) OR (((petroi OR (petruoi OR petrooi)) OR peteru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruoiv OR petruov) OR (((petroi OR (petruoi OR petrooi)) OR peteru) OR petr)) o.s.*".