Sorry about the delay on getting back to you on this.
So, you can git the terms a try, like I suggest in here:
"filter": [
{
"terms": {
"brand": [
"phrase 1", "phrase 2"
]
}
}
]
If you want to combine more filters, you just need to add them to the filter array and you will get the "AND" result as you wish, like this:
"filter": [
{
"terms": {
"survey": [
"phrase 1", "phrase 2"
]
}
},
{
"terms": {
"subjects": [
"phrase 1", "phrase 2"
]
}
}
]
Not sure if this is what you're aiming but let me know in any case.