Perhaps you should try some spelling variations:
surveillance covert » surveillance over, surveillance camera, surveillance cameras
design intelligent » designing intelligent, vision intelligent, driven intelligent
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: design intelligent ((surveillance court) OR (surveillance covert)).
• Adding a wildcard symbol may retrieve word variants: design intelligent ((surveillance court) or (surveillance covert))*.