Perhaps you should try some spelling variations:
irrigation equipment » purification equipment, irrigation development, application equipment
two dimensional » three dimensional
equipment two » equipment tan, equipment tee, equipment test
arrays string » arrays strings, arrays sorting, arrays swarming
array imaging » arrays imaging, airway imaging, ray imaging
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 equipment two dimensional ((((arrays string) or (array string))) or (array imaging))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation equipment two dimensional ((((arrays string) OR (array string))) OR (array imaging)).
• Adding a wildcard symbol may retrieve word variants: irrigation equipment two dimensional ((((arrays string) or (array string))) or (array imaging))*.