Perhaps you should try some spelling variations:
learning resource » learning research, teaching resource, teaching resources
training resource » training resources, teaching resource, defining resource
resource survey » resources surveys, resource curse, resource security
wbi training » wbi learning, 3 training, 3.3 training
resources » sources

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 (learning resources)) series. ) or ( wbi training resource survey. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( a ((learning resource) OR (learning resources)) series. ) OR ( wbi training resource survey. )).
• Adding a wildcard symbol may retrieve word variants: (( a ((learning resource) or (learning resources)) series. ) or ( wbi training resource survey. ))*.