Perhaps you should try some spelling variations:
teaching resource » teaching resources, teacher resource, learning resources
training refugee » training reform, training returns, training rules
resource series » resource studies, resource survey, resource settings
re teaching » _ teaching, grade teaching
re training » _ training, term training, job training

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

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