Perhaps you should try some spelling variations:
petriv » petris (Expand Search), petrov (Expand Search), peteriv (Expand Search), petroiv (Expand Search), periv (Expand Search)
petruuv » peteruuv (Expand Search), petrouuv (Expand Search), peruuv (Expand Search), pentruuv (Expand Search)
petr » peter (Expand Search), petro (Expand Search), per (Expand Search)
petru » peteru (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search)
petriu » peteriu (Expand Search), petroiu (Expand Search), periu (Expand Search), petris (Expand Search)
petri » peteri (Expand Search), petroi (Expand Search), peri (Expand Search)
peterov » petrov (Expand Search)
peteru » peter (Expand Search), peters (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 ((petruuv OR petriv) OR (((petr OR peterov) OR ((petru OR peteru) OR petriu)) OR petri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruuv OR petriv) OR (((petr OR peterov) OR ((petru OR peteru) OR petriu)) OR petri)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruuv OR petriv) OR (((petr OR peterov) OR ((petru OR peteru) OR petriu)) OR petri)) o.s.*.