Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
propagation hat » propagation han, propagation fast, propagation data
hat dimensions » hat dimension, data dimensions, head dimensions
array string » array strong, array sharing, array forming
array using » arrays using

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 hat dimensions ((((array using) or (array string))) or (arrays strings))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information propagation hat dimensions ((((array using) OR (array string))) OR (arrays strings)).
• Adding a wildcard symbol may retrieve word variants: information propagation hat dimensions ((((array using) or (array string))) or (arrays strings))*.