Perhaps you should try some spelling variations:
information tracking » information teaching, information taking, information extracting
state diffusion » surface diffusion
tracking state » tracing state, attacking state, tracking shape
array imaging » arrays imaging, airway imaging, ray imaging
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 tracking state diffusion ((((array string) or (array imaging))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information tracking state diffusion ((((array string) OR (array imaging))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information tracking state diffusion ((((array string) or (array imaging))) or (array format))*.