come give it a try

SELECT * FROM gallery2 WHERE topic_id="703939" UNION SELECT * FROM gallery2 WHERE topic_id="1663869" UNION SELECT * FROM gallery2 WHERE topic_id="1328364" UNION SELECT * FROM gallery2 WHERE topic_id="1409217" UNION SELECT * FROM gallery2 WHERE topic_id="995970" UNION SELECT * FROM gallery2 WHERE topic_id="1224433" UNION SELECT * FROM gallery2 WHERE topic_id="920070" UNION SELECT * FROM gallery2 WHERE topic_id="1215521" UNION SELECT * FROM gallery2 WHERE topic_id="856030" UNION SELECT * FROM gallery2 WHERE topic_id="1424074" UNION SELECT * FROM gallery2 WHERE topic_id="406159" UNION SELECT * FROM gallery2 WHERE topic_id="1292639" UNION SELECT * FROM gallery2 WHERE topic_id="1580418" UNION SELECT * FROM gallery2 WHERE topic_id="730503" UNION SELECT * FROM gallery2 WHERE topic_id="731334" UNION SELECT * FROM gallery2 WHERE topic_id="699767"