Perfect

SELECT * FROM gallery2 WHERE topic_id="1393364" UNION SELECT * FROM gallery2 WHERE topic_id="1397116" UNION SELECT * FROM gallery2 WHERE topic_id="653223" UNION SELECT * FROM gallery2 WHERE topic_id="404911" UNION SELECT * FROM gallery2 WHERE topic_id="623744" UNION SELECT * FROM gallery2 WHERE topic_id="1019345" UNION SELECT * FROM gallery2 WHERE topic_id="589945" UNION SELECT * FROM gallery2 WHERE topic_id="1491021" UNION SELECT * FROM gallery2 WHERE topic_id="515489" UNION SELECT * FROM gallery2 WHERE topic_id="1103871" UNION SELECT * FROM gallery2 WHERE topic_id="362092" UNION SELECT * FROM gallery2 WHERE topic_id="292796" UNION SELECT * FROM gallery2 WHERE topic_id="505977" UNION SELECT * FROM gallery2 WHERE topic_id="212659" UNION SELECT * FROM gallery2 WHERE topic_id="1164832" UNION SELECT * FROM gallery2 WHERE topic_id="1531291"