Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements n » requirements _, requirements a, requirements 7
n dimensional » _ dimensional, 3 dimensional, 2 dimensional
array string » arrays strings, array sharing, array forming
array strong » array sharing, norway strong, stay strong
array using » arrays using

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "irrigation requirements n dimensional ((((array using) OR (array string))) OR (array strong))~".
• Adding a wildcard symbol may retrieve word variants: irrigation requirements n dimensional ((((array using) OR (array string))) OR (array strong))*.