The correct spelling of the phrase "also joy" can be explained using the International Phonetic Alphabet (IPA). "Also" is spelled as /ˈɔlsoʊ/ and pronounced as "awl-soh", while "joy" is spelled as /dʒɔɪ/ and pronounced as "joy". When combined, the phrase "also joy" is pronounced as /ˈɔlsoʊ dʒɔɪ/ or "awl-soh joy". It is important to spell words accurately to convey the intended message properly and avoid confusion.