How to use なんか ( = nanka)

「てか、なんか、最近忙しいんだよね。」
 
= Teka, nanka, saikin isogashiin dayone.
 
= I don’t know why but I’ve been busy, you know.

「ほら見て!私、飛んでるよ!」
 
= Hora mite! Watashi, tonderu yo!
 
= Look! I am flying!
 
なんか、変!」
 
= Nanka, hen!
 
= Something is strange…
 
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