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