"Comb through" is a phrasal verb that describes a thorough and meticulous search or examination of something. Alternatives to this term include "scrutinize," which means to examine closely and critically, or "peruse," which refers to a careful reading or examination of something. Other synonyms for "comb through" include "sift through," "sort through," and "parse." Additionally, you may use "examine," "inspect," or "review" depending on context. Each of these verbs highlights a different aspect of searching or examining something, and choosing the right one can help to convey your intended meaning.