Job boards typically include positions posted by employers, while job search engines aggregate job listings from job boards and company websites.
Also, most sites have advanced search options that let you drill down even further to find jobs that are the best match for your skills, qualifications, and interests. Be sure to check out the advanced search options on any job search site.
Keep in mind, though, that career coaches recommend spending no more than 10 percent of your job searching time online. Devote the rest of your time to generating leads, networking, researching companies, and meeting people face to face