A combination/hybrid resume is simply a resume that takes the best of functional (skills-based) and chronological resumes and combines them into a resume that works best for you in light of your background, strengths, weaknesses, etc.
It is important to note that there is no single form of resume that works best in all cases. If such a resume existed, we'd all know about it and everyone would use the same format.
When looking at your resume, you might find that certain headings, such as your job title, don't match very well with the requirements of the job. If your job title doesn't adequately reflect what you actually do in your job, or if your job title is weak, this can be a limiting factor. In cases like this, don't hesitate to develop a hybrid resume that includes sub-titles or sub-headings that highlight your qualifications for the job. As discussed in the eBook, job titles in a resume can have a big impact, so pay serious attention to this detail.