diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml
index b084a1853b..8438844451 100644
--- a/doc/src/sgml/textsearch.sgml
+++ b/doc/src/sgml/textsearch.sgml
@@ -401,6 +401,32 @@ SELECT phraseto_tsquery('the cats ate the rats');
     but with more complex situations such as prefix-match patterns, a query
     of this form could be useful.)
    </para>
+
+   <para>
+    For example when some word exist in different forms and therefore this forms get the 
+    same position in <literal>tsvector</literal>, &amp; operator inside phrase operator 
+    can select phrases with only needed form of word. It will not count when
+    word <literal>complete</literal> is included with neither <literal>booking</literal> 
+    nor <literal>book</literal> as in case of plain &amp; outside phrase operator.
+
+<programlisting>
+SELECT to_tsvector('english_hunspell', 'complete booking complete lunch');
+       to_tsvector
+-----------------------------------------------
+ 'book':2 'booking':2 'complete':1,3 'lunch':4
+
+SELECT 'book:2 booking:2 complete:1,3 lunch:4'::tsvector @@ '(complete <-> (book & !booking))'::tsquery;
+ ?column?
+----------
+ f
+
+SELECT 'book:2 booking:2 complete:1,3 lunch:4'::tsvector @@ '(complete <-> book) & (complete <-> !booking)'::tsquery;
+ ?column?
+----------
+ t
+</programlisting>
+   </para>
+
   </sect2>
 
   <sect2 id="textsearch-intro-configurations">