Perhaps you should try some spelling variations:
learning resource » learning resources, learning research, teaching resource
training resource » training resources, teaching resource, defining resource
resource series » resources series, resource theories, resource studies
resource survey » resources surveys, resource curse, resource security
wbi training » wbi learning, 3 training, 3.3 training
4 learning » 2 learning, 3 learning

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( 4 learning resource series. ) or ( wbi training resource survey. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( 4 learning resource series. ) OR ( wbi training resource survey. )).
• Adding a wildcard symbol may retrieve word variants: (( 4 learning resource series. ) or ( wbi training resource survey. ))*.