Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
propagation based » propagation case, propagation a, propagation due
based extension » based extraction
array formulas » area formulas, harrop formulas, array formats
array probing » arrays probing, assay probing, array profiling

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 based extension ((((array probing) or (array formulas))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation based extension ((((array probing) OR (array formulas))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information propagation based extension ((((array probing) or (array formulas))) or (array format))*.