Perhaps you should try some spelling variations:
peteriiv » peterdi (Expand Search)
petruiov » petrov (Expand Search), peteruiov (Expand Search), petriuiov (Expand Search), petruuiov (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petruuiv (Expand Search)
petriuiiv » peteriuiiv (Expand Search), petriiuiiv (Expand Search), petruiuiiv (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((petruiv OR ((peteriiv OR petriuiiv) OR peteriiiv)) OR ((petriu OR petruiov) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR ((peteriiv OR petriuiiv) OR peteriiiv)) OR ((petriu OR petruiov) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiv OR ((peteriiv OR petriuiiv) OR peteriiiv)) OR ((petriu OR petruiov) OR petr)) o.s.*.