A developer needs to show only car accessories when shoppers use the search term car...

In managing search results within Salesforce B2C Commerce Cloud using Search Dictionaries, the goal to specifically show only "car accessories" while excluding "technology accessories" and "household accessories" can be achieved most effectively by using a Common Phrase Dictionary. The entry should be "car accessories" only, with the search mode set to "Exact Match". This setup ensures that only the exact term "car accessories" triggers the dictionary entry, thus filtering the search results directly according to the specified requirements without including unwanted categories.