Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements control » requirements controller, requirements common, requirements concept
control extensions » central extensions, central extension, control extending
array arcing » array forming, array probing, array sharing
array string » array strong, arrays strings, array sharing
array along » arrays long, array paving, array strong

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