Perhaps you should try some spelling variations:
learning resource » learning resources, learning research, teaching resource
resource agencies » resource centres, resource policies, resource theories
resource survey » resources surveys, resource curse, resource security
wbi teacher » smi teacher, asia teacher
base » based, case

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

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