Perhaps you should try some spelling variations:
information collection » information extraction, information communication
methods extending » networks extending, methods finding, methods enhancing
array string » array strong, arrays strings, array sharing
array using » arrays using
array fermi » array forming, array format

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 extending ((((array using) or (array string))) or (array fermi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information collection methods extending ((((array using) OR (array string))) OR (array fermi)).
• Adding a wildcard symbol may retrieve word variants: information collection methods extending ((((array using) or (array string))) or (array fermi))*.