Perhaps you should try some spelling variations:
learning resource » learning resources, learning research, teaching resource
resource series » resource studies, resource settings, resource agencies
resource survey » resource strategy, resource studies
resource curse » resource use, resource base
e learning » _ learning

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( e learning resource series. ) or ( _ teaching ((resource survey) or (resource curse)). ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( e learning resource series. ) OR ( _ teaching ((resource survey) OR (resource curse)). )).
• Adding a wildcard symbol may retrieve word variants: (( e learning resource series. ) or ( _ teaching ((resource survey) or (resource curse)). ))*.