You won’t find these two characters in your HSK list. They’re not used in standard mandarin, but they are used in some dialects.
嬲 is a very common word in Cantonese. cantonese.sheik.co.uk/dictionary/characters/309 [粵] nau1 – Cantonese only: get angry; take offence; detest [粵] niu5 | [國] niao3 [literary] tease; pester
