I'm not sure how to explain this in English, since I haven't seen this exact phenomenon used by English-speakers, so I'm looking for an efficient way to explain the phenomenon in English.
The closest equivalent to what I mean would be the "uh" I've seen in American English. An example would be a quote used as the name of a research article I've recently found: “I'm Not Sure I Can Handle the Kids, Especially, the, uh, You Know Special Ed Kids”.
In some other cultures, instead of "uh", it's more acceptable to actually say a word or a short phrase that's either literally meaningless or has a meaning but adds nothing to the conversation, but is instead used as a pause for speaker to collect his thoughts or to process newly gained information without actually making a break in speaking, like for example the "you know" from the quote I posted.
So I'm looking for a short phrase or a word that can be used to refer to the above-described words or short phrases.