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

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