Perhaps you should try some spelling variations:
petru » pentru (Expand Search), peteru (Expand Search), petrou (Expand Search), peru (Expand Search)
petruoi » pentruoi (Expand Search), peteruoi (Expand Search), petrouoi (Expand Search), peruoi (Expand Search)
petroov » petrov (Expand Search), peteroov (Expand Search), petrooov (Expand Search), peroov (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petroi » peteroi (Expand Search), petrooi (Expand Search), peroi (Expand Search), petro (Expand Search), petrov (Expand Search), petrow (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (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 (petru OR (petroov OR (petr OR ((petroi OR (petruoi OR peruoi)) OR petri)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petru OR (petroov OR (petr OR ((petroi OR (petruoi OR peruoi)) OR petri)))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (petru OR (petroov OR (petr OR ((petroi OR (petruoi OR peruoi)) OR petri)))) o.s.*.