You can search for single words or multiple words.
eg. [fossil] or [fossil tooth] (without the brackets)
note. Results will include pages with ALL words

You can search for an exact phrase using "" quotes.
eg. ["Charles Darwin"] (without the brackets)

You can search the whote site by choosing
---All Evidence Web--- in the dropdown list

You can search one section of the site by choosing
the desired section in the dropdown list