Perhaps you should try some spelling variations:
petruiv » peteruiv (Expand Search), petruuiv (Expand Search), petrouiv (Expand Search)
petriiv » peteriiv (Expand Search), petruiiv (Expand Search), petroiiv (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petruuo » peteruuo (Expand Search), petruuuo (Expand Search), petrouuo (Expand Search)
petrou » peterou (Expand Search), petruou (Expand Search), petroou (Expand Search), petru (Expand Search), petro (Expand Search), petrov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 petriiv) OR (((petr OR petr) OR petruuo) OR (petrou OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR petriiv) OR (((petr OR petr) OR petruuo) OR (petrou OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiv OR petriiv) OR (((petr OR petr) OR petruuo) OR (petrou OR petri))) o.s.*.