Perfect

SELECT * FROM gallery2 WHERE topic_id="1538113" UNION SELECT * FROM gallery2 WHERE topic_id="305908" UNION SELECT * FROM gallery2 WHERE topic_id="1474425" UNION SELECT * FROM gallery2 WHERE topic_id="928250" UNION SELECT * FROM gallery2 WHERE topic_id="620641" UNION SELECT * FROM gallery2 WHERE topic_id="136971" UNION SELECT * FROM gallery2 WHERE topic_id="1825770" UNION SELECT * FROM gallery2 WHERE topic_id="1269841" UNION SELECT * FROM gallery2 WHERE topic_id="1040583" UNION SELECT * FROM gallery2 WHERE topic_id="277474" UNION SELECT * FROM gallery2 WHERE topic_id="218135" UNION SELECT * FROM gallery2 WHERE topic_id="511548" UNION SELECT * FROM gallery2 WHERE topic_id="1700961" UNION SELECT * FROM gallery2 WHERE topic_id="575604" UNION SELECT * FROM gallery2 WHERE topic_id="771574" UNION SELECT * FROM gallery2 WHERE topic_id="927705"