Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petrio » peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petruoio » peteruoio (Expand Search), petriuoio (Expand Search), petruuoio (Expand Search)
petruuuoio » peteruuuoio (Expand Search), petriuuuoio (Expand Search), petruuuuoio (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 (petriiov OR (((petroi OR peteroi) OR (petrio OR (petruoio OR petruuuoio))) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriiov OR (((petroi OR peteroi) OR (petrio OR (petruoio OR petruuuoio))) OR petr)) o.s.*".