Kibana Visualization Searching Issue

I am creating visualization in kibana interface and visualization is made but in the result visualization not showing full result. For Example if i have two fields a, A it only shows A in the result not a in the result also when i try to filter the visualization and enter a it shows it already selected if there is any way that both A,a shows in the visualization

Hello,

Are a and A values for fields or fields?
Do you know if you have results for a in the selected time period? An easy way to check will be to head to discover and see if you are seeing results there.

One other thing could be - you are not using one of the fields in the visualization.

Thanks,
Bhavya