This is my structure for our advertising statistic.

I'm having trouble filtering the row labels as the feature is greyed out. The only way is to manually uncheck the items I want to exclude which is tedious.

I would like to filter row labels that contains only xxxxx string for example.

What should I be doing?

2014-11-06 13_43_03-Microsoft Excel - Monthly Report Oct 2014 [Compatibility Mode].jpg2014-11-06 13_43_41-Microsoft Excel - Monthly Report Oct 2014 [Compatibility Mode].jpg.