Perhaps you should try some spelling variations:
"vision intelligent surveillance covert" » "vision intelligent surface covert", "vision intelligent surveillance over", "vision intelligent surveillance court", "vision intelligent surveillance camera"
"design intelligence surveillance covert" » "design intelligent surveillance covert", "foreign intelligence surveillance covert", "designing intelligent surveillance covert", "design intelligence surveillance over", "design intelligence surveillance court", "design intelligence surveillance camera"
"decision intelligence surveillance covert" » "decision intelligence surveillance over", "decision intelligence surveillance court", "decision intelligence surveillance camera"

Try widening your search to All Fields.

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 intelligence surveillance covert") OR ((("decision intelligence surveillance covert") OR ("vision intelligent surveillance covert")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"design intelligence surveillance covert\") or (((\"decision intelligence surveillance covert\") OR (\"vision intelligent surveillance covert\"))))".
• Removing quotes may allow a broader search: (( design intelligence surveillance covert ) or ((( decision intelligence surveillance covert ) OR ( vision intelligent surveillance covert )))).
• Adding a wildcard symbol may retrieve word variants: (("design intelligence surveillance covert") or ((("decision intelligence surveillance covert") OR ("vision intelligent surveillance covert"))))*.