Perhaps you should try some spelling variations:
learning resource » learning resources, learning research, teaching resource
resource agencies » resource centres, resource policies, resource theories
defining resource » designing resource, defining sources, drinking resource
resource curse » resource base
1 defining » 2 defining, 3 defining, 2.2 defining

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 agencies. ) or ( 1 defining resource curse. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( e learning resource agencies. ) OR ( 1 defining resource curse. )).
• Adding a wildcard symbol may retrieve word variants: (( e learning resource agencies. ) or ( 1 defining resource curse. ))*.