Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements mixed » requirements based, requirements model, requirements meet
mixed dimensional » five dimensional, higher dimensional, three dimensional
arrays searching » agents searching, maps searching
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 mixed dimensional ((array string) or (arrays searching))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation requirements mixed dimensional ((array string) OR (arrays searching)).
• Adding a wildcard symbol may retrieve word variants: irrigation requirements mixed dimensional ((array string) or (arrays searching))*.