Perhaps you should try some spelling variations:
teaching resources » learning resources
learning resource » learning resources, learning research, training resources
teaching resource » teaching research, teacher resource, learning resources
resource curse » resource base
ii teaching » 1 teaching, 10 teaching, 3 teaching

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( a ((learning resource) OR (teaching resources)) survey. ) or ( ii teaching resource curse. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( a ((learning resource) OR (teaching resources)) survey. ) OR ( ii teaching resource curse. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( a ((learning resource) OR (teaching resources)) survey. ) or ( ii teaching resource curse. ))".
• Adding a wildcard symbol may retrieve word variants: (( a ((learning resource) OR (teaching resources)) survey. ) or ( ii teaching resource curse. ))*.