Perhaps you should try some spelling variations:
information online » information modeling
sparse diffusion » state diffusion, pore diffusion, aware diffusion
array processing » dairy processing, query processing
online sparse » online course, online search, online square
array string » array strong, arrays strings, array sharing
array using » arrays using

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

• If you are trying to use Boolean operators, they must be ALL CAPS: information online sparse diffusion ((((array processing) OR (array string))) OR (array using))~.
• Adding a wildcard symbol may retrieve word variants: information online sparse diffusion ((((array processing) or (array string))) or (array using))*.