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