Perhaps you should try some spelling variations:
"channels information professional series" » "channels information professionals series", "channels formacion profesional series", "channels introduction professional series", "channel information professional series", "channel formation professional series", "change information professional series", "channels information professional stories", "channels information professional server", "channels information professional selves"
"channels information professional services" » "channels information professionals services", "channels formacion profesional services", "channels introduction professional services", "channel information professional services", "channel formation professional services", "change information professional services"
"channels information processing series" » "channel information processing series", "channel formation processing series", "change information processing series", "channels information processing services", "channels information processing queries", "channels information processing species"

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