By default blogger has Blog name in the page title. You should remove blog name from page title to improve your search engin visibility. This will help you in two ways, 1. you will reduce number of charecters in the page title and 2. your keyword will appear first.
STEPS To Remove Blog Name From Page Title :
1. Login, Go to Blogger setting, Layout, Edit HTML
2. Take a backup by clicking Download Template
3. Expand Widget Templates
4. Search for <title> and you will find following lines. Change them as suggested below:
<b:if cond='data:blog.pageType == "index"'>
5. Click Save Template