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