"Specific accomplishments" refers to achievements or successes that are clearly defined and highly particular. It means accomplishing something tangible, measurable, and distinct.
I recommend that the first sentence of each middle paragraph is strong, and focuses on specific accomplishments, skills, and qualifications necessary for the job. (simple-resume-writing-instructions.com)
The «skills» need to be presented in the context of specific accomplishments. (careerdigital.com)
Use bullet points to highlight specific accomplishments based on the position you're seeking. (career-development-help.com)