It seems that a single word "naughty" can have so many translation which is confusing me.

Examples :
hư, hư đốn, nghịch ngợm
a naughty boy
thằng bé hư
thô tục, tục tĩu, nhảm
naughty words
những lời nói tục tĩu
naughty books
sách nhảm
bướng bỉnh
(using Vdict online dictionary)


Need help in the exact translation of the word "naughty" , "very naughty"
Appreciate any help in this. thks