Perhaps you should try some spelling variations:
information boundary » information bounds, information summary, information standard
tracing diffusion » branching diffusion, imaging diffusion, brain diffusion
boundary tracing » boundary making, boundary traces, boundary searching
array arcing » array forming, array probing, array sharing
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: information boundary tracing diffusion ((((array arcing) or (array string))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information boundary tracing diffusion ((((array arcing) OR (array string))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information boundary tracing diffusion ((((array arcing) or (array string))) or (array format))*.