Searching inside documents

I have uploaded different types of document . I want the Plone's default search to search inside the documents and display the results.

Is it possible . If so how to do it.

I am thankful to everyone who replies.

Use Apache tika in the backend. Refer to https://github.com/4teamwork/ftw.tika

Plone supports indexing for standard formats like PDF, DOCX etc. out of the box if the related external converters are installed.