Perhaps you should try some spelling variations:
irrigation requirements » irrigation equipment, nutrition requirements
requirements two » requirements do, requirements tools, requirements test
microarrays from » microarrays _, microarrays a, microarrays gene
two dimensional » three dimensional
bioarray from » bioarrays from
microarrays » microardays, microarray, microarways
rays » days, ray, ways

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 two dimensional ((((bioarray from) or (microarrays from))) or (rays from))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation requirements two dimensional ((((bioarray from) OR (microarrays from))) OR (rays from)).
• Adding a wildcard symbol may retrieve word variants: irrigation requirements two dimensional ((((bioarray from) or (microarrays from))) or (rays from))*.