Try it

SELECT * FROM gallery2 WHERE topic_id="1037202" UNION SELECT * FROM gallery2 WHERE topic_id="1807108" UNION SELECT * FROM gallery2 WHERE topic_id="1187900" UNION SELECT * FROM gallery2 WHERE topic_id="1510973" UNION SELECT * FROM gallery2 WHERE topic_id="1363447" UNION SELECT * FROM gallery2 WHERE topic_id="66784" UNION SELECT * FROM gallery2 WHERE topic_id="978803" UNION SELECT * FROM gallery2 WHERE topic_id="1634331" UNION SELECT * FROM gallery2 WHERE topic_id="1098343" UNION SELECT * FROM gallery2 WHERE topic_id="1014787" UNION SELECT * FROM gallery2 WHERE topic_id="821493" UNION SELECT * FROM gallery2 WHERE topic_id="813287" UNION SELECT * FROM gallery2 WHERE topic_id="459305" UNION SELECT * FROM gallery2 WHERE topic_id="57633" UNION SELECT * FROM gallery2 WHERE topic_id="1288742" UNION SELECT * FROM gallery2 WHERE topic_id="660461"