Adobe ACROBAT READER 7.0 Manual page 221

Searching across multiple Adobe PDF documents
You can use the Search PDF window to find words in Adobe PDF files stored in a specific
location on your hard disk or network, in prepared Adobe PDF index files, and in Adobe
PDF files on the Internet.
Note: To search for words in multiple Adobe PDF documents, Adobe PDF indexes, or
Adobe PDF files on the Internet, open the Adobe Reader application from your desktop
rather than within your web browser window.
Related Subtopics:
Searching all Adobe PDF files in a specific location
Using advanced search options for multiple-document searches
Refining results of multiple-document searches
Searching Adobe PDF index files
Using Boolean queries in multiple-document searches
Searching Adobe PDF documents on the Internet