дело(concern; business; affair; responsibility (usually used in negative constructions) eg "be no nevermind of someone's" • It's no nevermind of yourscollinsdictionary.com); забота(concern; business; affair; responsibility (usually used in negative constructions) eg "be no nevermind of someone's" • It's no nevermind of yourscollinsdictionary.com)
внимание(attention; heed; notice (usually used in negative constructions), eg "pay someone (or something) no nevermind – не обращать на кого-либо/что-либо внимания" • Pay him no nevermindcollinsdictionary.com'More)
не говоря уже о(*stealing someone else's examples is not nice* • Sovereignty is a dead issue for Quebecers, never mind the rest of the country • Ukrainian families are being put in brand new residential detached properties costing 245,000. There's not enough housing for the Scots, never mind anyone else. Congolians, Afghanistans as well. Charity begins at home. (dailymail.co.uk)ART Vancouver)
unexplained-mysteries.com ART Vancouver); даром что (She was beautiful – never mind she was only a ghost. Рина Грант); забудь (Andy); нужды нет; ничего, что задело; ничего страшного; не беспокойтесь по поводу (sb., sth., кого-л., чего-л.); брось (бросьте • Hurry up. Never mind
your precious belongings. Abysslooker)