Perhaps you should try some spelling variations:
learning dimension » learning decision, learning session
formation problem » location problem, population problem, formation process
problem learning » problems learning, profile learning, from learning
array imaging » arrays imaging, airway imaging, ray imaging
array using » arrays using

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

• Performing a fuzzy search may retrieve terms with similar spellings: formation problem learning dimension ((((array using) or (array imaging))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: formation problem learning dimension ((((array using) OR (array imaging))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: formation problem learning dimension ((((array using) or (array imaging))) or (array format))*.