The correct spelling of the phrase "going effort of" is /ˈɡoʊɪŋ ˈɛfərt ʌv/. The word "going" is spelled with the letter "g" which represents the phoneme /ɡ/. "Effort" is spelled with the combination of letters "eff" representing the phoneme /ɛf/ and "ort" representing the phoneme /ərt/. Lastly, "of" is spelled with the letter "o" representing the phoneme /ʌ/ and the letter "f" representing the phoneme /f/. It is important to spell words accurately in order to convey a clear and concise message.