Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petroiov (Expand Search)
petriuuv » peteriuuv (Expand Search), petriiuuv (Expand Search), petroiuuv (Expand Search)
petriiuuv » peteriiuuv (Expand Search), petriiiuuv (Expand Search), petroiiuuv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 (((petriov OR peteriov) OR (petriuuv OR petriiuuv)) OR ((petru OR peteruo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriov OR peteriov) OR (petriuuv OR petriiuuv)) OR ((petru OR peteruo) OR petr)) o.s.*".