Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements case » requirements based, requirements a, requirements _
case dimensions » scale dimensions, based dimensions, class dimensions
array imaging » arrays imaging, airway imaging, ray imaging
array arcing » array forming, array probing, array sharing
arrays ang » arrays a

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

• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation requirements case dimensions ((((array arcing) OR (arrays ang))) OR (array imaging))~.
• Adding a wildcard symbol may retrieve word variants: irrigation requirements case dimensions ((((array arcing) or (arrays ang))) or (array imaging))*.