The spelling of the word "more more" is quite straightforward. It is simply the word "more" repeated twice. The phonetic transcription for "more" is /mɔː(r)/, which means the vowel sound in the word is an elongated "o" followed by an "r" sound. Therefore, the correct spelling for "more more" is just that - "more more" - with the same phonetic transcription as "more" repeated twice. It's a simple way to emphasize the desire for an increased amount of something.