Perhaps you should try some spelling variations:
information requirements » nutrition requirements, irrigation requirements, information environments
information documents » information documentation, information agents
varying definitions » working definitions, marketing definitions, varying functions
definitions age » definitions alex, definitions have, definitions a
age iberia » age siberia, lake iberian

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((information documents) or (information requirements)) varying definitions age iberia~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((information documents) OR (information requirements)) varying definitions age iberia.
• Adding a wildcard symbol may retrieve word variants: ((information documents) or (information requirements)) varying definitions age iberia*.