Perhaps you should try some spelling variations:
information dissemination » information visualization, information integration
contracts extensions » central extensions, contracts questions
control extensions » central extensions, central extension, control extending
array arcing » array forming, array probing, array sharing

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• Performing a fuzzy search may retrieve terms with similar spellings: information dissemination ((contracts extensions) or (control extensions)) array arcing~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information dissemination ((contracts extensions) OR (control extensions)) array arcing.
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