How to search multiple objects

Dear Friends,

It is been some weeks I have been thinking over it. Kindly answer this.

In the Applcation explorer I am selecting some class objects and trying to find some word in those selected objects.

I dont see any option available there.  Can you tell is there any alternative approach to achieve this.

FYI, I also tried to keep objects in project and tried to do so but no luck. I cannot find any option.