Perhaps you should try some spelling variations:
petrouov » petrov (Expand Search), peterouov (Expand Search), petruouov (Expand Search), petroouov (Expand Search)
petroouov » peteroouov (Expand Search), petruoouov (Expand Search), petrooouov (Expand Search)
petrououov » peterououov (Expand Search), petruououov (Expand Search), petroououov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petrouo » peterouo (Expand Search), petruouo (Expand Search), petroouo (Expand Search)
petroouo » peteroouo (Expand Search), petruoouo (Expand Search), petrooouo (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 (((petrouov OR petroouov) OR petrououov) OR ((petri OR (petrouo OR petroouo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petrouov OR petroouov) OR petrououov) OR ((petri OR (petrouo OR petroouo)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petrouov OR petroouov) OR petrououov) OR ((petri OR (petrouo OR petroouo)) OR petr)) o.s.*.