DOCS-10382: Clarify text search phrase matching behaviour

Author: stennie

source/text-search.txt

@@ -57,12 +57,15 @@ Exact Phrase
 ````````````
 
 You can also search for exact phrases by wrapping them in double-quotes.
-For example, the following will find all documents containing "java" or
+If the ``$search`` string includes a phrase and individual terms, text search
+will only match documents that include the phrase.
+
+For example, the following will find all documents containing
 "coffee shop":
 
 .. code-block:: javascript
 
-   db.stores.find( { $text: { $search: "java \"coffee shop\"" } } )
+   db.stores.find( { $text: { $search: "\"coffee shop\"" } } )
 
 Term Exclusion
 ``````````````