Perhaps you should try some spelling variations:
irrigation equivalent » irrigation equipment, irrigation requirement, irrigation requirements
equivalent sources » equivalent scores, equivalent bodies, equivalent forms
sources vision » resources division
array sharing » array string, arrays bearing, array imaging
array arcing » array forming, array probing, array using
array paving » array planning, array imaging, array probing

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 equivalent sources vision ((((array sharing) OR (array arcing))) OR (array paving))~.
• Adding a wildcard symbol may retrieve word variants: irrigation equivalent sources vision ((((array sharing) or (array arcing))) or (array paving))*.