"Comb this" can be replaced with several other phrases to convey the same meaning. One synonym for "comb this" is "search through thoroughly" or "examine closely." Another option could be "scrutinize" or "inspect meticulously." If someone is looking for a more forceful way to speak about reviewing something, they could say "delve into" or "analyze in detail." Additionally, "dissect" or "pore over" could be used to describe a thorough examination of something. Regardless of which phrase is chosen, the goal remains the same: to examine something closely and thoroughly in order to gain a better understanding of it.