"Casting about for" are three words to denote searching or looking for something in an uncertain or haphazard way. Peppered with frustration and confusion, this phrase can be replaced with numerous synonyms that pack more clarity and precision to the action. The word "scrutinize" highlights the effort to examine or inspect something in detail and search for clues that could identify what is sought. "Scour" suggests a thorough and intense search of a place or an object, violently going over everything. "Peruse" means to read or glance through something carefully to uncover specific information. "Hunt" implies a purposeful search for something, usually for food or treasure. These words lend more accuracy and character to the act of "casting about for".