Perhaps you should try some spelling variations:
petroiov » peteroiov (Expand Search), petrioiov (Expand Search), petruoiov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petriiov » peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petruoiv » peteruoiv (Expand Search), petriuoiv (Expand Search), petruuoiv (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 ((((petroiov OR petrov) OR petriiov) OR (petriv OR petruoiv)) OR (peteri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petroiov OR petrov) OR petriiov) OR (petriv OR petruoiv)) OR (peteri OR petr)) o.s.*".