Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petruiiov (Expand Search), petroiiov (Expand Search)
petriiv » peteriiv (Expand Search), petruiiv (Expand Search), petroiiv (Expand Search)
petrouuiiv » peterouuiiv (Expand Search), petruouuiiv (Expand Search), petroouuiiv (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petruiiov » peteruiiov (Expand Search), petruuiiov (Expand Search), petrouiiov (Expand Search)
petruuiov » peteruuiov (Expand Search), petruuuiov (Expand Search), petrouuiov (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 petrouuiiv) OR ((petri OR ((petriiov OR petruiiov) OR petruuiov)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiv OR petrouuiiv) OR ((petri OR ((petriiov OR petruiiov) OR petruuiov)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiv OR petrouuiiv) OR ((petri OR ((petriiov OR petruiiov) OR petruuiov)) OR petr)) o.s.*.