searching for a phrase in Mongodb: weird behaviour - mongodb

Question

i have the following collection:
books> db.books.find()
[
{
_id: ObjectId("61ab85b0056b5357b5e23e6b"),
fields: 'hello good morning'
},
{ _id: ObjectId("61ab85b5056b5357b5e23e6c"), fields: 'good morning' },
{
_id: ObjectId("61ab8679056b5357b5e23e6d"),
fields: 'hello good morning guys'
},
{
_id: ObjectId("61ab8684056b5357b5e23e6e"),
fields: 'good morning guys'
}
]
Then, i run this query:
db.books.find({$text : {$search : "\"good morning\" hello"}})
and i get:
[
{ _id: ObjectId("61ab85b5056b5357b5e23e6c"), fields: 'good morning' },
{
_id: ObjectId("61ab8684056b5357b5e23e6e"),
fields: 'good morning guys'
},
{
_id: ObjectId("61ab85b0056b5357b5e23e6b"),
fields: 'hello good morning'
},
{
_id: ObjectId("61ab8679056b5357b5e23e6d"),
fields: 'hello good morning guys'
}
]
Can you help me to understand the output? The first result doesn't make much sense to me (document _id : ...23e6c), as it doesn't contain the "hello" string.
I read the first answer to this question. Does it mean that, in my case, mongodb is searching for
(good morning) AND (good OR morning OR hello)
It would explain my question, but i can't find the exact reference to this in the mongodb documentation
Thanks in advance

Answer 1

Directly from the docs:
A string of terms that MongoDB parses and uses to query the text index. MongoDB performs a logical OR search of the terms unless specified as a phrase. See Behavior for more information on the field.
This is just the behavior a text index allows, What you can do it mark every single expression as a "phrase", like so:
{$text : {$search : "\"good morning\" \"hello\""}}
This will enforce $and logic.