Perhaps you should try some spelling variations:
petriv » petri (Expand Search), petris (Expand Search), petrov (Expand Search), peteriv (Expand Search), petriiv (Expand Search), petroiv (Expand Search)
peterov » petrov (Expand Search), peterv (Expand Search), petersv (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search), pentru (Expand Search), petri (Expand Search)
peteri » peterdi (Expand Search), peter (Expand Search), petri (Expand Search)
petero » peter (Expand Search), peters (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 ((petriv OR peterov) OR (((petr OR peteri) OR (petero OR petru)) OR peteri)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriv OR peterov) OR (((petr OR peteri) OR (petero OR petru)) OR peteri)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriv OR peterov) OR (((petr OR peteri) OR (petero OR petru)) OR peteri)) o.s.*.