Perhaps you should try some spelling variations:
petrouov » petrov (Expand Search), peterouov (Expand Search), petruouov (Expand Search), petroouov (Expand Search)
petrooov » petrov (Expand Search), peterooov (Expand Search), petruooov (Expand Search), petroooov (Expand Search)
petruoiv » petrov (Expand Search), peteruoiv (Expand Search), petruuoiv (Expand Search), petrouoiv (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 peterov) OR (petrooov OR petruov)) OR petruoiv) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petrouov OR peterov) OR (petrooov OR petruov)) OR petruoiv) OR (petri OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petrouov OR peterov) OR (petrooov OR petruov)) OR petruoiv) OR (petri OR petr)) o.s.*.