Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements c.w » requirements can, requirements ch, requirements case
c.w divisions » new divisions, cell divisions, _ divisions
array probing » arrays probing, assay probing, array profiling
array strong » array string, array sharing, norway strong
array arcing » array forming, array sharing, array using

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 c.w divisions ((((array strong) OR (array arcing))) OR (array probing))~.
• Adding a wildcard symbol may retrieve word variants: irrigation requirements c.w divisions ((((array strong) or (array arcing))) or (array probing))*.