Perhaps you should try some spelling variations:
petroouv » petrov (Expand Search), peteroouv (Expand Search), petrooouv (Expand Search), peroouv (Expand Search)
petruv » peteruv (Expand Search), petrouv (Expand Search), peruv (Expand Search)
petrouv » peterouv (Expand Search), petroouv (Expand Search), perouv (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (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 ((petruv OR (petrouv OR petroouv)) OR ((petri OR petru) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR (petrouv OR petroouv)) OR ((petri OR petru) OR petr)) o.s.*".