Perhaps you should try some spelling variations:
channel expert » channel experts, change expert, channel excess
channel export » channel experts, channel port, channel support
group papers » group part
ira climate » era climate, iea climate, area climate

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd/ira climate ((channel expert) OR (channel export)) group papers".
• Adding a wildcard symbol may retrieve word variants: oecd/ira climate ((channel expert) OR (channel export)) group papers*.