Use enhanced search option not only across multiple local drives and archives, but even on FTP servers.
To search for specific files, click the "Search file" toolbar button. Tune the filters:
RegEx - Regular Expressions find patterns in text.
Case sensitive - Allows searching for words that differ in meaning based on usage of uppercase and lowercase letters. Matching case can significantly improve the search results.
Depth - Allows limiting search depth to a current directory or to a certain level.
Search in archives - Allows searching in all archives.
Find text - Allows searching for text contained in the files.
Whole words - Search for whole words only.
Unicode/Hex/UTF8/ANSI - Search for text in Unicode/Hex/UTF8/ANSI files only.
You can either go to a search result with the "Go to File" button, or work with the whole file list by clicking "Feed to Active Panel":
You can also use Spotlight engine to search for files. Spotlight is a search feature of Mac OS. Spotlight searches through local drives only.
Go to Command --> Search in Spotlight:
A text field will be invoked, where a search query can be entered. Search results will be immediately listed. You can either go to a search result with the "Go to File" button, or work with the whole file list by clicking "Feed to Active Panel".