Perhaps you should try some spelling variations:
"radio science series 12:, applied sciences" » "radio science services 12:, applied sciences", "radio science stories 12:, applied sciences", "radio science theories 12:, applied sciences", "radio science series 2:, applied sciences", "radio science series 1:, applied sciences", "radio science series 10:, applied sciences"
"radio science series 11:, applied sciences" » "radio science services 11:, applied sciences", "radio science stories 11:, applied sciences", "radio science theories 11:, applied sciences", "radio science series 1:, applied sciences", "radio science series 10:, applied sciences", "radio science series 3:, applied sciences"

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: (("radio science series 12:, applied sciences") OR ("radio science series 11:, applied sciences")).
• Removing quotes may allow a broader search: (( radio science series 12:, applied sciences ) or ( radio science series 11:, applied sciences )).
• Adding a wildcard symbol may retrieve word variants: (("radio science series 12:, applied sciences") or ("radio science series 11:, applied sciences"))*.