es:PRIMARY> db.articles.find(
{ simple_index: { $all: [ 'Advent', 'Xdebug'] } },
{ subject: 1, _id: 0 }
).pretty();
{ "subject" : "Contributing Advent 1: Xdebug and hidden properties" }
{ "subject" : "Contributing Advent 8: The magic __FILE__ constant" }
{ "subject" : "Contributing Advent 15: Xdebug connection timeout" }
{ "subject" : "Contributing Advent 17: Printing stacks" }
{ "subject" : "Contributing Advent 20: Xdebug halting on error" }
{ "subject" : "Contributing Advent 23: Reproducing issues" }
{ "subject" : "Contributing Advent 24: Wrapping up!" }
es:PRIMARY> es:PRIMARY> db.articles.find(
{ simple_index: { $all: [ 'advent', 'Xdebug'] } },
{ subject: 1, _id: 0 }
).pretty();
es:PRIMARY>