Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petriov » petrov (Expand Search), peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petrouv » petrov (Expand Search), peterouv (Expand Search), petruouv (Expand Search), petroouv (Expand Search)
petroov » petrov (Expand Search), peteroov (Expand Search), petruoov (Expand Search), petrooov (Expand Search)
petrououv » peterououv (Expand Search), petruououv (Expand Search), petroououv (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop (((petruov OR petriov) OR ((petrouv OR petrououv) OR petroov)) OR (petr OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petruov OR petriov) OR ((petrouv OR petrououv) OR petroov)) OR (petr OR petri)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petruov OR petriov) OR ((petrouv OR petrououv) OR petroov)) OR (petr OR petri)) o.s.*.