diff --git a/src/applications/conpherence/query/ConpherenceThreadQuery.php b/src/applications/conpherence/query/ConpherenceThreadQuery.php
--- a/src/applications/conpherence/query/ConpherenceThreadQuery.php
+++ b/src/applications/conpherence/query/ConpherenceThreadQuery.php
@@ -17,6 +17,7 @@
   private $afterTransactionID;
   private $beforeTransactionID;
   private $transactionLimit;
+  private $fulltext;
 
   public function needFilePHIDs($need_file_phids) {
     $this->needFilePHIDs = $need_file_phids;
@@ -82,6 +83,11 @@
     return $this->transactionLimit;
   }
 
+  public function withFulltext($query) {
+    $this->fulltext = $query;
+    return $this;
+  }
+
   protected function loadPage() {
     $table = new ConpherenceThread();
     $conn_r = $table->establishConnection('r');
@@ -122,7 +128,7 @@
   }
 
   protected function buildGroupClause(AphrontDatabaseConnection $conn_r) {
-    if ($this->participantPHIDs !== null) {
+    if ($this->participantPHIDs !== null || strlen($this->fulltext)) {
       return 'GROUP BY conpherence_thread.id';
     } else {
       return $this->buildApplicationSearchGroupClause($conn_r);
@@ -149,6 +155,12 @@
         $viewer->getPHID());
     }
 
+    if (strlen($this->fulltext)) {
+      $joins[] = qsprintf(
+        $conn_r,
+        'JOIN %T idx ON idx.threadPHID = conpherence_thread.phid',
+        id(new ConpherenceIndex())->getTableName());
+    }
 
     $joins[] = $this->buildApplicationSearchJoinClause($conn_r);
     return implode(' ', $joins);
@@ -196,6 +208,13 @@
         (int)$this->isRoom);
     }
 
+    if (strlen($this->fulltext)) {
+      $where[] = qsprintf(
+        $conn_r,
+        'MATCH(idx.corpus) AGAINST (%s IN BOOLEAN MODE)',
+        $this->fulltext);
+    }
+
     $viewer = $this->getViewer();
     if ($this->shouldJoinForViewer($viewer)) {
       $where[] = qsprintf(
diff --git a/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php b/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php
--- a/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php
+++ b/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php
@@ -18,6 +18,8 @@
       'participantPHIDs',
       $this->readUsersFromRequest($request, 'participants'));
 
+    $saved->setParameter('fulltext', $request->getStr('fulltext'));
+
     $saved->setParameter(
       'threadType',
       $request->getStr('threadType'));
@@ -34,6 +36,11 @@
       $query->withParticipantPHIDs($participant_phids);
     }
 
+    $fulltext = $saved->getParameter('fulltext');
+    if (strlen($fulltext)) {
+      $query->withFulltext($fulltext);
+    }
+
     $thread_type = $saved->getParameter('threadType');
     if (idx($this->getTypeOptions(), $thread_type)) {
       switch ($thread_type) {
@@ -57,6 +64,7 @@
     PhabricatorSavedQuery $saved) {
 
     $participant_phids = $saved->getParameter('participantPHIDs', array());
+    $fulltext = $saved->getParameter('fulltext');
 
     $form
       ->appendControl(
@@ -66,6 +74,11 @@
           ->setLabel(pht('Participants'))
           ->setValue($participant_phids))
       ->appendControl(
+        id(new AphrontFormTextControl())
+          ->setName('fulltext')
+          ->setLabel(pht('Contains Words'))
+          ->setValue($fulltext))
+      ->appendControl(
         id(new AphrontFormSelectControl())
         ->setLabel(pht('Type'))
         ->setName('threadType')