Thinking

SELECT * FROM gallery2 WHERE topic_id="378831" UNION SELECT * FROM gallery2 WHERE topic_id="293098" UNION SELECT * FROM gallery2 WHERE topic_id="576913" UNION SELECT * FROM gallery2 WHERE topic_id="66035" UNION SELECT * FROM gallery2 WHERE topic_id="1367405" UNION SELECT * FROM gallery2 WHERE topic_id="1827206" UNION SELECT * FROM gallery2 WHERE topic_id="1425722" UNION SELECT * FROM gallery2 WHERE topic_id="356735" UNION SELECT * FROM gallery2 WHERE topic_id="1227305" UNION SELECT * FROM gallery2 WHERE topic_id="573744" UNION SELECT * FROM gallery2 WHERE topic_id="1095163" UNION SELECT * FROM gallery2 WHERE topic_id="1216741" UNION SELECT * FROM gallery2 WHERE topic_id="15788" UNION SELECT * FROM gallery2 WHERE topic_id="365602" UNION SELECT * FROM gallery2 WHERE topic_id="198181" UNION SELECT * FROM gallery2 WHERE topic_id="730813"