Perhaps you should try some spelling variations:
information collection » information extraction, information communication
methods sources » methods series, methods studies, methods survey
array forming » array format, array arcing, array fermi
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 collection methods sources ((((array string) or (array forming))) or (array imaging))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information collection methods sources ((((array string) OR (array forming))) OR (array imaging)).
• Adding a wildcard symbol may retrieve word variants: information collection methods sources ((((array string) or (array forming))) or (array imaging))*.