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