Case studies (also called "case histories") are descriptions of real situations that provide a context for engineers and others to explore problems. Case studies typically involve complex issues where there is often no single correct answer--you may be asked to select the "best" answer given the situation.
Case studies allow you to:
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Consider combining your topic or discipline with "case study" or "case history"
Remember, use quotes to keep your phrase together!
Then choose Studies or Case Studies under Topic to narrow your results further