Perhaps you should try some spelling variations:
"quantum dynamics systems" » "quantum dynamic systems", "quantum dynamical systems", "quantum dynamic system", "quantum dynamic systemss"
"random dynamics system" » "random dynamical system", "random dynamic system", "random 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: (("quantum dynamics systems") OR ("random dynamics system")).
• Removing quotes may allow a broader search: (( quantum dynamics systems ) or ( random dynamics system )).
• Adding a wildcard symbol may retrieve word variants: (("quantum dynamics systems") or ("random dynamics system"))*.