Perhaps you should try some spelling variations:
experiments remarks » experimental remarks, experiments results, experiments related
experiments report » experiment report, experimental report, experimental reports
oecd economics » oecd economic, oecd economies, kcd economics

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 economics ((experiments remarks) OR (experiments report)) charters*.