Perhaps you should try some spelling variations:
information diffraction » information extraction, information diffusion, information interaction
diffraction methods » extraction methods
methods robert » methods robust, methods recent, methods report
array arcing » array forming, array probing, array sharing
array fermi » array forming, array format

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

• Performing a fuzzy search may retrieve terms with similar spellings: information diffraction methods robert ((((array arcing) or (array fermi))) or (arrays using))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information diffraction methods robert ((((array arcing) OR (array fermi))) OR (arrays using)).
• Adding a wildcard symbol may retrieve word variants: information diffraction methods robert ((((array arcing) or (array fermi))) or (arrays using))*.