Perhaps you should try some spelling variations:
information sources » information resources, information services, information sciences
david dimensions » basic dimensions, dark dimensions, based dimensions
sources david » sources based, sources asia
array formats » assay formats, array formulas, ready 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 david dimensions ((array format) OR (((array formats) OR (array string))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information sources david dimensions ((array format) OR (((array formats) OR (array string))))".
• Adding a wildcard symbol may retrieve word variants: information sources david dimensions ((array format) OR (((array formats) OR (array string))))*.