Perhaps you should try some spelling variations:
"azimuthal quantum number" » "azimuthal quantum punumber"
"azimuthal quantum numbers" » "azimuthal quantum punumbers"
"azimuth quantum number" » "azimuth quantum punumber"

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