Perhaps you should try some spelling variations:
source diffusion » resource diffusion, surface diffusion, double diffusion
information gis » information gain, information gaps, information grid
array sharing » arrays bearing, array imaging, way sharing
array formats » array format, assay formats, array formulas
array string » array strong, arrays strings, array forming
gis source » gas source, gras source, nirs source

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information gis source diffusion ((((array sharing) or (array string))) or (array formats))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information gis source diffusion ((((array sharing) OR (array string))) OR (array formats)).
• Adding a wildcard symbol may retrieve word variants: information gis source diffusion ((((array sharing) or (array string))) or (array formats))*.