Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
array formulas » area formulas, harrop formulas, array formats
propagation a » propagation _
array string » array strong, arrays strings, array sharing
a dimension » _ dimension, new dimension

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information propagation a dimension ((((array string) or (array format))) or (array formulas))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation a dimension ((((array string) OR (array format))) OR (array formulas)).
• Adding a wildcard symbol may retrieve word variants: information propagation a dimension ((((array string) or (array format))) or (array formulas))*.