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