Perhaps you should try some spelling variations:
intelligent surveillance » intelligent surface
decision intelligence » vision intelligent
learning intelligent » using intelligent
surveillance covert » surveillance over, surveillance court, surveillance camera
mining intelligent » using intelligent, designing intelligent, building intelligent
surveillance part » surveillance a, surveillance after, surveillance _

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: (((( learning intelligent surveillance covert ) OR ( mining intelligent surveillance part ))) OR ( decision intelligence surveillance covert )).
• Adding a wildcard symbol may retrieve word variants: (((( learning intelligent surveillance covert ) or ( mining intelligent surveillance part ))) or ( decision intelligence surveillance covert ))*.