arangosh> db.emails.ensureFulltextIndex("content");
{ 
  "id" : "emails/465095923", 
  "type" : "fulltext", 
  "fields" : [ 
    "content" 
  ], 
  "unique" : false, 
  "sparse" : true, 
  "minLength" : 2, 
  "isNewlyCreated" : true, 
  "code" : 201 
}
arangosh> db.emails.save({ content: "Hello Alice, how are you doing? Regards, Bob" });
{ 
  "_id" : "emails/465423603", 
  "_rev" : "465423603", 
  "_key" : "465423603" 
}
arangosh> db.emails.save({ content: "Hello Charlie, do Alice and Bob know about it?" });
{ 
  "_id" : "emails/465620211", 
  "_rev" : "465620211", 
  "_key" : "465620211" 
}
arangosh> db.emails.save({ content: "I think they don't know. Regards, Eve" });
{ 
  "_id" : "emails/465816819", 
  "_rev" : "465816819", 
  "_key" : "465816819" 
}
arangosh> db.emails.fulltext("content", "charlie,|eve").toArray();
[ 
  { 
    "_id" : "emails/465620211", 
    "_key" : "465620211", 
    "_rev" : "465620211", 
    "content" : "Hello Charlie, do Alice and Bob know about it?" 
  }, 
  { 
    "_id" : "emails/465816819", 
    "_key" : "465816819", 
    "_rev" : "465816819", 
    "content" : "I think they don't know. Regards, Eve" 
  } 
]