Perhaps you should try some spelling variations:
information spaces » information sources, information series, information services
matrix dimensions » material dimensions, metrics dimensions, matrix extensions
array formulas » area formulas, harrop formulas, array format
spaces matrix » sparse matrix
array probing » arrays probing, assay probing, array profiling
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 spaces matrix dimensions ((((array string) or (array formulas))) or (array probing))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information spaces matrix dimensions ((((array string) OR (array formulas))) OR (array probing)).
• Adding a wildcard symbol may retrieve word variants: information spaces matrix dimensions ((((array string) or (array formulas))) or (array probing))*.