Firstly, you should know that what "MS Office" actually mean.

MS Office: Continuously working from more than 2½ years at Word, for personal use of Documentation. Additionally I know to run Excel and PowerPoint with less practice than Word.

Dear Employer, If I say in simple way, I'm skilled in "MS Office" practically. And I can do two types of works by my this Skill which I named "Technical Works" and "Educational Works". Technical Works donates all types of works excluding educational works which consists of technical phenomena. Examples of technical works we can take are creating, editing & auditing of documents, charts and more. And "Educational Works" donates Writing, blogging, teaching about creating, editing & auditing of documents, charts and more etc. 

Summary:

So, In short I can do all kinds of Educational and Technical works with the help of my "MS Office" skill.