Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements based » requirements a
array profiling » array processing, microarray profiling
based revision » base revision, based precision, based decision
array arcing » array forming, array probing, array sharing
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 based revision ((((array arcing) OR (array string))) OR (array profiling))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "irrigation requirements based revision ((((array arcing) OR (array string))) OR (array profiling))*".