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 forming » array arcing, array fermi, array string
array formats » assay formats, array formulas, ready formats

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

• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation based extension ((((array forming) OR (array formats))) OR (array format))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information propagation based extension ((((array forming) OR (array formats))) or (array format))~".
• Adding a wildcard symbol may retrieve word variants: information propagation based extension ((((array forming) OR (array formats))) or (array format))*.