Perhaps you should try some spelling variations:
intelligent surveillance » intelligence surveillance, intelligent surface
designing intelligent » learning intelligent, mining intelligent, developing intelligent
surveillance covert » surveillance over, surveillance camera, surveillance cameras
surveillance court » surveillance art, surveillance control, surveillance camera

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: (((( designing intelligent surveillance covert ) OR ( designing intelligent surveillance court ))) OR ( vision intelligent surveillance covert )).
• Adding a wildcard symbol may retrieve word variants: (((( designing intelligent surveillance covert ) or ( designing intelligent surveillance court ))) or ( vision intelligent surveillance covert ))*.