Label pages limited to 20 posts, Increase to 50, Blogger

Blogger label page is limited to 20 posts.

It is possible to increase this result to 50 posts and no more.

I need to add ?max-results=50 at the ene of url for example:
/search/label/Tweak?max-results=50
/search/label/Command Line?max-results=50
/search/label/Batch File?max-results=50
/search/label/Adobe%20Reader%2011?max-results=50
/search/label/AutoIt?max-results=50
/search/label/Blogger?max-results=50

To modify global template look for content:

expr:href='data:label.url'

and replace with:

expr:href='data:label.url + "?max-results=50"'