By default providing a list of words separated by spaces performs a search to find any of the specified words (logical OR), with stemming of each word. Logical AND isn't supported.

The common workaround to perform a logical AND seems to be to wrap each word in quotes to do phrase matching. However, this has the side effect of disabling stemming.

Steps to reproduce:

1. Insert some data

use textSearch
db.foo.createIndex({"$**": "text"})
db.foo.save({phrase: "phrase includes foo"})
db.foo.save({phrase: "phrase includes bar"})

2. Returning both inserted documents using the query terms "including" and "foo" with stemming and a logical OR is possible:

db.foo.find({$text: {$search: "including foo"}}).count()

3. Using an exact phrase matching to create a logical and without stemming to find one document is possible:

db.foo.find({$text: {$search: "\"includes\" \"foo\""}}).count()

4. Combining the logical and with word stemming to return only the first inserted document using the query terms "including" and "foo" doesn't seem to be possible.