Perhaps you should try some spelling variations:
"random dynamics systems" » "random dynamic systems", "random dynamical systems", "random dynamic system", "random dynamic systemss"
"quantum dynamics system" » "quantum dynamic system", "quantum dynamical system", "quantum dynamic systems"

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: (("random dynamics systems") OR ("quantum dynamics system")).
• Removing quotes may allow a broader search: (( random dynamics systems ) or ( quantum dynamics system )).
• Adding a wildcard symbol may retrieve word variants: (("random dynamics systems") or ("quantum dynamics system"))*.