"Xin Nian Kuai Le" (新年快乐) is a phrase in Mandarin Chinese that means "Happy New Year." There is no exact equivalent in English that sounds the same as this phrase, but you could try saying "Shing Nian Kwai Luh" to approximate the pronunciation in Mandarin. Keep in mind that this is not a proper translation, but rather a way to mimic the sounds of the original phrase in Mandarin.
Alternatively, you could simply say "Happy New Year" in English, which is a common way to greet someone during the New Year's holiday.