Perhaps you should try some spelling variations:
petriiov » peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petruiuv (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 petrov) OR petruov) OR (petruv OR petriuv)) OR peteriv) OR petr) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((((petriiov OR petrov) OR petruov) OR (petruv OR petriuv)) OR peteriv) OR petr) o.s.*".