Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements two » requirements do, requirements tools, requirements test
two dimensional » three dimensional
arrays string » arrays strings, arrays sorting, arrays swarming
array imaging » arrays imaging, airway imaging, ray imaging
array string » array strong, arrays strings, array sharing

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