Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements four » requirements food, requirements forums, requirements cloud
four dimensional » one dimensional, low dimensional, two dimensional
arrays string » arrays strings, arrays sorting, arrays swarming
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 four dimensional ((arrays string) OR (array string))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "irrigation requirements four dimensional ((arrays string) OR (array string))".
• Adding a wildcard symbol may retrieve word variants: irrigation requirements four dimensional ((arrays string) OR (array string))*.