Perhaps you should try some spelling variations:
information collection » information extraction, information communication
methods extending » networks extending, methods finding, methods enhancing
array probing » arrays probing, assay probing, array profiling
array forming » array format, array arcing, array fermi
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 extending ((((array probing) or (array string))) or (array forming))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information collection methods extending ((((array probing) OR (array string))) OR (array forming)).
• Adding a wildcard symbol may retrieve word variants: information collection methods extending ((((array probing) or (array string))) or (array forming))*.