Querying all public facebook posts

I need to build an application that will have three input fields for three URLs. Application then needs to search all public posts on facebook and find users who posted that specific URLs. I'm using this code:

$q = "http://www.someurl.com";
$search = $facebook->api('/search?q=' . $q .'&type=post&limit=200');
foreach ($value as $fkey=>$fvalue) {
    if(isset($fvalue['from']['name']))
    {
        echo $fvalue['from']['name']."<br />";
    }
    }}

This prints out 200 facebook user's names that posted one specific link. But, as I mentioned above, I need to search for multiple URL match. By using this approach, I would need to make three query calls and then cross-reference results and get users that appear on all three result lists. Is there any way to form query to return needed results in just one call? I now that FQL is powerful tool, but I think that it cannot be used for this kind of public queries. Am I really limited only to public graph api? And if that is the case, is it possible to form complex query using only graph api?

EDIT#1: I tried using following FQL:

SELECT source_id FROM stream WHERE
CONTAINS('http://www.incgamers.com/2013/12/doom-20th-anniversary-today-true-classic') 
AND CONTAINS('http://kotaku.com/5917693/ten-years-of-civ-ii-lock-the-world-in-perpetual-war') 
AND CONTAINS('http://www.youtube.com/watch?v=1TBxdXm3DP0') limit 200

As I understand, this should return users who have these three links in their fb stream. However, that is not the case. Am I getting this all wrong?

---

A simpler approach will be to just check the presence of a URL in the message part of the Post. This fql should work:

SELECT message FROM stream WHERE CONTAINS("http://www.incgamers.com/2013/12/doom-20th-anniversary-today-true-classic") 
AND strpos(message,'http://www.incgamers.com/2013/12/doom-20th-anniversary-today-true-classic') >=0

Similarly, to search for a post containing all three links you can extend the fql further.

SELECT message FROM stream WHERE CONTAINS("http://www.incgamers.com/2013/12/doom-20th-anniversary-today-true-classic") 
AND strpos(message,'http://www.incgamers.com/2013/12/doom-20th-anniversary-today-true-classic') >=0 
AND CONTAINS("http://kotaku.com/5917693/ten-years-of-civ-ii-lock-the-world-in-perpetual-war") 
AND strpos(message,'http://kotaku.com/5917693/ten-years-of-civ-ii-lock-the-world-in-perpetual-war') >=0 
AND CONTAINS("http://www.youtube.com/watch?v=1TBxdXm3DP0") 
AND strpos(message,'http://www.youtube.com/watch?v=1TBxdXm3DP0') >=0 

---

由于Facebook在2013年12月中旬禁用了公共帖子搜索功能，因此不再可能。

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