/sys$common/syshlp/helplib.hlb SHOW, ENTRY, Qualifiers, /SEARCH  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /SEARCH="string"

    Use with the /PAGE=SAVE qualifier to specify a string that you
    want to find in the information being displayed. Quotation marks
    are required for the /SEARCH qualifier, if you include spaces in
    the text string.

    You can also dynamically change the search string by pressing the
    Find key (E1) while the information is being displayed. Quotation
    marks are not required for a dynamic search.