Perhaps you should try some spelling variations:
"spatial angular" » "optical angular", "essential angular", "spatial language"
"radical glial" » "radical global", "radial glia", "radical social"
"central angle" » "central range", "spectral angle", "central andes"

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: (((("radial glial") OR ("radical glial"))) OR ((("spatial angular") OR ("central angle"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"radial glial\") OR (\"radical glial\"))) or (((\"spatial angular\") or (\"central angle\"))))*".
• Removing quotes may allow a broader search: (((( radial glial ) OR ( radical glial ))) or ((( spatial angular ) or ( central angle ))))*.