Let's try this

SELECT * FROM gallery2 WHERE topic_id="552557" UNION SELECT * FROM gallery2 WHERE topic_id="774039" UNION SELECT * FROM gallery2 WHERE topic_id="670534" UNION SELECT * FROM gallery2 WHERE topic_id="1096557" UNION SELECT * FROM gallery2 WHERE topic_id="1199865" UNION SELECT * FROM gallery2 WHERE topic_id="1531091" UNION SELECT * FROM gallery2 WHERE topic_id="783287" UNION SELECT * FROM gallery2 WHERE topic_id="364225" UNION SELECT * FROM gallery2 WHERE topic_id="1747046" UNION SELECT * FROM gallery2 WHERE topic_id="238051" UNION SELECT * FROM gallery2 WHERE topic_id="338793" UNION SELECT * FROM gallery2 WHERE topic_id="504355" UNION SELECT * FROM gallery2 WHERE topic_id="971351" UNION SELECT * FROM gallery2 WHERE topic_id="856424" UNION SELECT * FROM gallery2 WHERE topic_id="1347467" UNION SELECT * FROM gallery2 WHERE topic_id="905322"