Perhaps you should try some spelling variations:
peteroov » petrov (Expand Search)
petriouv » petrov (Expand Search), peteriouv (Expand Search), petriiouv (Expand Search), petruiouv (Expand Search)
petriuv » peteriuv (Expand Search), petriiuv (Expand Search), petruiuv (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (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 ((((peteroov OR peteriv) OR (petriuv OR petriouv)) OR petruov) OR (petriu OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((peteroov OR peteriv) OR (petriuv OR petriouv)) OR petruov) OR (petriu OR petr)) o.s.*".