Perhaps you should try some spelling variations:
irrigation requirement » irrigation requirements, irrigation equipment, irrigation department
requirement patterns » requirements patterns, frequent patterns, settlement patterns
patterns definition » pattern definition, patterns definitional, patterns recognition
array imaging » arrays imaging, airway imaging, ray imaging
array strong » array string, array sharing, norway strong
array along » arrays long, array arcing, array paving

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

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