I'm going away for a few days...

[Beeesneees]

It's not impossible - but it's not a standard, grammatically correct phrase. It is simply the wrong vocabulary.

'go off on holiday' is a set phrase, which is unique to that situation.
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Cheers m' dears!

[Fariba Effort]

Hi Dear Alan,
Your explanations have always been so much useful for me. Can you explain more about the differences between go away, go out, go off.
Thank you.
Fariba