Perhaps you should try some spelling variations:
communication content » communication concepts, communication control, communication conflict
using statistics » using statistical, business statistics, computing statistics
based extension » based extraction
using spatio » using spatial, using sparse
using static » using semantic, using stochastic

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

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