Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
petriuuuov » peteriuuuov (Expand Search), petriiuuuov (Expand Search), petroiuuuov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petroiu » peteroiu (Expand Search), petrioiu (Expand Search), petrooiu (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petroui (Expand Search)
petr » peter (Expand Search), petri (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 ((petruov OR petriuuuov) OR ((((petru OR petroiu) OR petrui) OR peteriv) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR petriuuuov) OR ((((petru OR petroiu) OR petrui) OR peteriv) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruov OR petriuuuov) OR ((((petru OR petroiu) OR petrui) OR peteriv) OR petr)) o.s.*.