Fail 3 times

Hello there,

I am desperate, I have failed the Admin test three times. I need a concise and good advised to pass this test. I reschedule again to take in two weeks, the followings are my results: Thanks in advanced.

Section-Level Scoring:
Standard and Custom Objects: 87%
AppExchange: 0%
Security and Access: 50%
Analytics – Reports and Dashboards: 66%
Service and Support Applications: 75%
Data Management: 100%
Activity Management and Collaboration: 50%
User Setup: 50%
Desktop and Mobile Administration: 0%
Organization Set-Up: 50%
Workflow/Process Automation: 40%
Sales and Marketing Applications: 37%