Perfect

SELECT * FROM gallery2 WHERE topic_id="1678570" UNION SELECT * FROM gallery2 WHERE topic_id="1009518" UNION SELECT * FROM gallery2 WHERE topic_id="649060" UNION SELECT * FROM gallery2 WHERE topic_id="1139460" UNION SELECT * FROM gallery2 WHERE topic_id="741159" UNION SELECT * FROM gallery2 WHERE topic_id="675309" UNION SELECT * FROM gallery2 WHERE topic_id="1304398" UNION SELECT * FROM gallery2 WHERE topic_id="980322" UNION SELECT * FROM gallery2 WHERE topic_id="393428" UNION SELECT * FROM gallery2 WHERE topic_id="160434" UNION SELECT * FROM gallery2 WHERE topic_id="550370" UNION SELECT * FROM gallery2 WHERE topic_id="154203" UNION SELECT * FROM gallery2 WHERE topic_id="844371" UNION SELECT * FROM gallery2 WHERE topic_id="1159288" UNION SELECT * FROM gallery2 WHERE topic_id="1174962" UNION SELECT * FROM gallery2 WHERE topic_id="513294"