Master Detail search in cxGrid with Provider Mode in Delphi

I Work in a Manufacturing company, Currently i am working on Delphi Language. I am dealing with a project, where I have a cxGrid, in which I have to search the text from Master and Detail both views. Data controller is Provider mode, where the data is loaded from an external file i.e. non-aware. My problem is: if the required data is present in both master and grid, then I can filter the record but if the data is present only in the Detail grid of a master but not in the master, then I am unable to filter that record. I am new to this Dev Express Component, i dont think so, it will be that long, please help me if anyone is willing. Regards