Perhaps you should try some spelling variations:
information sources » information resources, information services, information sciences
changing dimensions » emerging dimensions
sources changing » sources chenming, scares changing, studies changing
array formulas » area formulas, harrop formulas, array formats
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 sources changing dimensions ((((array string) or (array formulas))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information sources changing dimensions ((((array string) OR (array formulas))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information sources changing dimensions ((((array string) or (array formulas))) or (array format))*.