few / phew are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
few: (noun) a small elite group. (adjective) a quantifier that can be used with count nouns and is often preceded by `a'; a small but indefinite number.
phew: NA
few: f·y·UW
phew: f·y·UW
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)