Perhaps you should try some spelling variations:
channel effects » change effects
change expert » change extent, changing expert, channel experts
group papers » group part
iea climate » sea climate, ira climate, area climate
era climate » ira climate, area climate, a climate

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: oecd/((iea climate) OR (era climate)) ((change expert) OR (channel effects)) group papers.
• Adding a wildcard symbol may retrieve word variants: oecd/((iea climate) or (era climate)) ((change expert) or (channel effects)) group papers*.