Talvez debería tentar con algunhas variantes ortográficas:
surface diffusion » state diffusion
information gaps » information gap, information games, information gain
gaps surface » gas surface, maps surface, glass surface
array arcing » array forming, array probing, array sharing
array strong » array string, array sharing, norway strong
arrays load » arrays brad

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

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