How many different types of ways do you eat Vietnamese? 🍰

SELECT * FROM gallery2 WHERE topic_id="1726152" UNION SELECT * FROM gallery2 WHERE topic_id="697614" UNION SELECT * FROM gallery2 WHERE topic_id="1486973" UNION SELECT * FROM gallery2 WHERE topic_id="594000" UNION SELECT * FROM gallery2 WHERE topic_id="1065" UNION SELECT * FROM gallery2 WHERE topic_id="1527319" UNION SELECT * FROM gallery2 WHERE topic_id="1110968" UNION SELECT * FROM gallery2 WHERE topic_id="845385" UNION SELECT * FROM gallery2 WHERE topic_id="1213938" UNION SELECT * FROM gallery2 WHERE topic_id="4058" UNION SELECT * FROM gallery2 WHERE topic_id="1477293" UNION SELECT * FROM gallery2 WHERE topic_id="1412300" UNION SELECT * FROM gallery2 WHERE topic_id="223853" UNION SELECT * FROM gallery2 WHERE topic_id="1242237" UNION SELECT * FROM gallery2 WHERE topic_id="70326" UNION SELECT * FROM gallery2 WHERE topic_id="503805"