Perhaps you should try some spelling variations:
channel events » change events, channel effects, channel currents
change expert » changing expert, channel experts, change effect
change extent » change event, change latent, change extended
iea climate » sea climate, ira climate, area climate
group part » groups part

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