Search all open documents?

I have fifteen documents, each reviewing one in a series of lectures. My end of year task is to write an analysis and I have the fifteen documents open for reference - as well as the new document I am creating.

I need to be able to search for themes such as ‘security’ quickly see what was said in each document about it, as well as search for which document a quotation I know of exists in.

Is there a way to do this or must I search each document individually?

  1. You could use some external search tool such as Copernic.
  2. You could create a master document which includes all the subdocuments (which you could export to PDF for quicker handling).

Thank you mahfiaz, the Master Document is what I need. Well, it’s the best solution.