Perhaps you should try some spelling variations:
"quantum numerical calculations" » "quantum numerical calculation", "quantum numerical simulations", "quantum numerical simulation", "quantiles numerical calculations", "momentum numerical calculations", "quantum chemical calculations"
"quantum spherical calculations" » "quantum chemical calculations", "quantum numerical calculation", "quantum several calculations", "quantum optical calculations", "quantum specials calculations"
"quantum physical calculations" » "quantum physics calculations", "quantum chemical calculations", "quantum typical calculations", "quantum classical calculations"

Try widening your search to All Fields.

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 numerical calculations") OR ((("quantum spherical calculations") OR ("quantum physical calculations")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"quantum numerical calculations\") or (((\"quantum spherical calculations\") OR (\"quantum physical calculations\"))))".
• Removing quotes may allow a broader search: (( quantum numerical calculations ) or ((( quantum spherical calculations ) OR ( quantum physical calculations )))).
• Adding a wildcard symbol may retrieve word variants: (("quantum numerical calculations") or ((("quantum spherical calculations") OR ("quantum physical calculations"))))*.