Perhaps you should try some spelling variations:
learning resource » learning resources, learning research, teaching resource
resource series » resources series, resource theories, resource studies
course series » discourse series
wbi training » 3 training, 3.3 training, 4 training
wbi learning » 2 learning, 3 learning, 4 learning

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((wbi training) OR (wbi learning)) course series. ) or ( _ learning resource series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((wbi training) OR (wbi learning)) course series. ) OR ( _ learning resource series. ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((wbi training) OR (wbi learning)) course series. ) or ( _ learning resource series. ))*".