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