I believe you are asking if there is a difference between the verbs 'to hide' and 'to veil'.
To veil something is to hide it with a veil or as if it was hidden by a veil.
"The veiled herself at the funeral."
"The mist veiled the landscape."
To veil can also mean to hide one's true intentions.
"He issued a veiled threat, which Tom understood."
However, if you just hide something, you can also hide where it is. That is not veiling it. If you veil something, you know where it is - you just can't see it clearly. If I hide a treasure, I don't veil it.