Perhaps you should try some spelling variations:
information agents » information age, information access, information about
content functions » content functional, constants functions, concepts functions
context functions » control functions, context reflections, cost functions
context function » control function, context section, control functions

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information agents ((content functions) or (((context function) OR (context functions)))) from land~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information agents ((content functions) OR (((context function) OR (context functions)))) from land.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information agents ((content functions) or (((context function) OR (context functions)))) from land".
• Adding a wildcard symbol may retrieve word variants: information agents ((content functions) or (((context function) OR (context functions)))) from land*.