Perhaps you should try some spelling variations:
petruov » petrov (Expand Search), pentruov (Expand Search), petriov (Expand Search), peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
peterov » petrov (Expand Search)
petriv » petri (Expand Search), petris (Expand Search), petrov (Expand Search), peteriv (Expand Search), petriiv (Expand Search), petroiv (Expand Search)
petru » pentru (Expand Search), petri (Expand Search), peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petruou » pentruou (Expand Search), petriou (Expand Search), peteruou (Expand Search), petriuou (Expand Search), petrouou (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 peterov) OR peteruv) OR (petriv OR (petru OR petruou))) OR (petr OR per)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petruov OR peterov) OR peteruv) OR (petriv OR (petru OR petruou))) OR (petr OR per)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((petruov OR peterov) OR peteruv) OR (petriv OR (petru OR petruou))) OR (petr OR per)) o.s.*.