Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
information documents » information documentation, information agents, information requirements
based dispersion » wave dispersion, gas dispersion, based discussion
dispersion area » dispersion janet, dispersion after, dispersion based
area afta » area data

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 (irrigation requirements)) based dispersion area afta~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((information documents) OR (irrigation requirements)) based dispersion area afta.
• Adding a wildcard symbol may retrieve word variants: ((information documents) or (irrigation requirements)) based dispersion area afta*.