Perhaps you should try some spelling variations:
information agents » information age, information access, information about
elicitation from » elicitation _
exception from » exceptions from, perception from, reception from
excision from » exclusion from, excitation from, decisions from
agents base » agents based, agents case, agents cased

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 base ((((excision from) or (exception from))) or (elicitation from)) several~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information agents base ((((excision from) OR (exception from))) OR (elicitation from)) several.
• Adding a wildcard symbol may retrieve word variants: information agents base ((((excision from) or (exception from))) or (elicitation from)) several*.