Perhaps you should try some spelling variations:
channel experts » channel export, channel effects, channel events
change expert » changing expert, change effect, change effort
change extent » change event, change latent, change extended
group papers » group part
iea climate » ira climate, area climate, rica climate
sea climate » asia climate, a climate, data 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 (sea climate)) ((((change expert) OR (change extent))) OR (channel experts)) group papers.
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd/((iea climate) OR (sea climate)) ((((change expert) or (change extent))) or (channel experts)) group papers".
• Adding a wildcard symbol may retrieve word variants: oecd/((iea climate) OR (sea climate)) ((((change expert) or (change extent))) or (channel experts)) group papers*.