Perhaps you should try some spelling variations:
"designing intelligent surveillance based" » "designing intelligent surface based", "learning intelligent surveillance based", "mining intelligent surveillance based", "developing intelligent surveillance based", "designing intelligent surveillance camera", "designing intelligent surveillance a", "designing intelligent surveillance after"
"design intelligent surveillance avss" » "design intelligent surface avss", "driven intelligent surveillance avss", "design intelligent surveillance a", "design intelligent surveillance after", "design intelligent surveillance _"
"decision intelligence surveillance covert" » "vision intelligent surveillance covert", "decision intelligence surveillance over", "decision intelligence surveillance court", "decision intelligence surveillance camera"
"design intelligence surveillance based" » "foreign intelligence surveillance based", "design intelligence surveillance camera", "design intelligence surveillance a", "design intelligence surveillance after"

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