Perhaps you should try some spelling variations:
communication cross » communication across, communication case, communication circuits
based extension » based extraction
using spatio » using spatial, using sparse
using static » using semantic, using statistics
cross based » crops based, class based, rss based

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication cross based extension ((((using spatio) or (using static))) or (using stochastic))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication cross based extension ((((using spatio) OR (using static))) OR (using stochastic)).
• Adding a wildcard symbol may retrieve word variants: communication cross based extension ((((using spatio) or (using static))) or (using stochastic))*.