Perhaps you should try some spelling variations:
petrov » petro (Expand Search), petriov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petriuuv » petriiuuv (Expand Search), petruiuuv (Expand Search), petroiuuv (Expand Search)
petruiiouv » petriuiiouv (Expand Search), petruuiiouv (Expand Search), petrouiiouv (Expand Search)
petruoi » petriuoi (Expand Search), petruuoi (Expand Search), petrouoi (Expand Search)
petriuo » petriiuo (Expand Search), petruiuo (Expand Search), petroiuo (Expand Search)
petr » petri (Expand Search), petru (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 (((petriuuv OR petrov) OR petruiiouv) OR ((petruoi OR petriuo) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriuuv OR petrov) OR petruiiouv) OR ((petruoi OR petriuo) OR (petr OR peter))) o.s.*".