Perhaps you should try some spelling variations:
changing expert » changing export, changing expertise, enhancing expert
channel events » change events, channel effects, channel currents
change expert » change extent, channel experts, change effect
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/sea climate ((((change expert) OR (changing expert))) OR (channel events)) group papers.
• Adding a wildcard symbol may retrieve word variants: oecd/sea climate ((((change expert) or (changing expert))) or (channel events)) group papers*.