"turn them all off" or "turn all them off"?

"turn them all off" 84,800 results

"turn all them off" 63,200 results

both are correct?

Solution 1:

The second is INCORRECT. (unless that was a typo)

The phrase "turn all of them off" is correct, however.

The stress is different in these two phrases, however. For most uses, the difference between these two is quite subtle, so nothing to worry about.

In the second phrase you can put the emphasis on "THEM"

So, you could say: "Turn all of THEM off" (pointing to a specific set of light switches)

Using the first phrase in like manner sounds awkward.

Solution 2:

"Turn them all off" and "Turn all of them off" are both correct, but there's a slight difference in meaning, or at least in emphasis. "Turn all them off" is informal usage at best.