Would 怎麼知道 or 怎麼知 be the right Mandarin equivalent to the Cantonese phrase 點知? Would 怎麼知道 or 怎麼知 be the right Mandarin equivalent to the Cantonese phrase 點知?

If not, what would be the right equivalent?
點 in Cantonese can mean 'how'. It is equivalent to 怎 / 怎麼 /如何 in Mandarin

(點)辦 = (怎)辦

噉(點)得 = 這(怎麼)行 

(點)算好 = (如何)是好

(點)知 = (怎)知