Perhaps you should try some spelling variations:
change expert » change extent, changing expert, channel experts
change latent » change patient, change agent, change latin
rica climate » africa climate, iea climate, ira climate
group papers » group part
latent group » latent groups, patent group, patient group

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/rica climate change expert group papers ) OR ( oecd/rica climate change latent group papers )).
• Adding a wildcard symbol may retrieve word variants: (( oecd/rica climate change expert group papers ) or ( oecd/rica climate change latent group papers ))*.