Perhaps you should try some spelling variations:
information requirements » nutrition requirements, irrigation requirements, information environments
information agents » information age, information access, information about
a decisional » _ decisional, a decision
david open » david orden, david kopec, david apet
owens » owen, opens

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) or (information requirements)) a decisional ((david open) or (david owens))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((information agents) OR (information requirements)) a decisional ((david open) OR (david owens)).
• Adding a wildcard symbol may retrieve word variants: ((information agents) or (information requirements)) a decisional ((david open) or (david owens))*.