Perhaps you should try some spelling variations:
channels information » channel formation, change information, changed information
professional stories » professional studies, professional sports, professional bodies
channel information » channel formation, change information, changing information
professional series » professional services, professional server, professional selves

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: ((channels information) OR (channel information)) ((professional series) OR (professional stories)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((channels information) OR (channel information)) ((professional series) or (professional stories))".
• Adding a wildcard symbol may retrieve word variants: ((channels information) OR (channel information)) ((professional series) or (professional stories))*.