Perhaps you should try some spelling variations:
channel experts » channel export, channel effects, channel events
change expert » change extent, changing expert, change effect
area climate » asia climate, sea climate, africa climate
group papers » group part
ira climate » era climate, iea climate, rica 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/((ira climate) OR (area climate)) ((change expert) OR (channel experts)) group papers.
• Adding a wildcard symbol may retrieve word variants: oecd/((ira climate) or (area climate)) ((change expert) or (channel experts)) group papers*.