Perhaps you should try some spelling variations:
"quantum dynamical system" » "quantum chemical system", "quantum dynamic systems"
"quantum dynamical systems" » "quantum chemical systems", "quantum dynamic systemss"
"quantum dynamics system" » "quantum dynamic system", "quantum dynamic systems", "quantum dynamisches 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: (((("quantum dynamical system") OR ("quantum dynamical systems"))) OR ("quantum dynamics system")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"quantum dynamical system\") OR (\"quantum dynamical systems\"))) or (\"quantum dynamics system\"))".
• Removing quotes may allow a broader search: (((( quantum dynamical system ) OR ( quantum dynamical systems ))) or ( quantum dynamics system )).
• Adding a wildcard symbol may retrieve word variants: (((("quantum dynamical system") OR ("quantum dynamical systems"))) or ("quantum dynamics system"))*.