Perhaps you should try some spelling variations:
petruiov » petrov (Expand Search), peteruiov (Expand Search), petruuiov (Expand Search), petrouiov (Expand Search)
peteruov » petrov (Expand Search)
petriiv » peteriiv (Expand Search), petruiiv (Expand Search), petroiiv (Expand Search)
petruiuiov » peteruiuiov (Expand Search), petruuiuiov (Expand Search), petrouiuiov (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 ((((petriiv OR peteriv) OR (petruiov OR petruiuiov)) OR peteruov) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriiv OR peteriv) OR (petruiov OR petruiuiov)) OR peteruov) OR (petri OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petriiv OR peteriv) OR (petruiov OR petruiuiov)) OR peteruov) OR (petri OR petr)) o.s.*.