Perhaps you should try some spelling variations:
science theories » science theory, science three
radio audiences » reading audiences, latino audiences, madrid audiences
radio sciences » bio sciences, audio science, do sciences
theories ii » theories 1, theories 2
serious ii » serious air, serious _, serious 2

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 sciences) OR (radio audiences)) serious ii:, mathematics, physics AND chemistry\") or (\"radio science theories ii:, mathematics, physics AND chemistry\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"((radio sciences) OR (radio audiences)) serious ii:, mathematics, physics and chemistry\\") or (\\"radio science theories ii:, mathematics, physics and chemistry\\"))\"".
• Removing quotes may allow a broader search: (( ((radio sciences) OR (radio audiences)) serious ii:, mathematics, physics and chemistry ) or ( radio science theories ii:, mathematics, physics and chemistry )).