Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements lower » requirements power, requirements cawe, requirements come
lower dimensional » low dimensional, one dimensional, four 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 lower dimensional ((arrays searching) or (array string))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation requirements lower dimensional ((arrays searching) OR (array string)).
• Adding a wildcard symbol may retrieve word variants: irrigation requirements lower dimensional ((arrays searching) or (array string))*.