Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements first » requirements finish, requirements from, requirements free
first dimensional » first dimension, finite dimensional, five dimensional
array imaging » arrays imaging, airway imaging, ray imaging
array string » arrays strings, array sharing, array forming
array strong » array sharing, norway strong, stay strong

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

• Performing a fuzzy search may retrieve terms with similar spellings: irrigation requirements first dimensional ((array string) or (((array strong) or (array imaging))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation requirements first dimensional ((array string) OR (((array strong) OR (array imaging)))).
• Adding a wildcard symbol may retrieve word variants: irrigation requirements first dimensional ((array string) or (((array strong) or (array imaging))))*.