Perhaps you should try some spelling variations:
"3 teaching resources survey." » "3 learning resources survey.", "3 teaching resources surveys.", "3 teaching resource survey.", "3 teaching resources series.", "1 teaching resources survey.", "4 teaching resources survey.", "10 teaching resources survey."
"smi teacher resource theories." » "smi teacher resource theory.", "smi teacher resources series.", "smi teacher resource agencies.", "smi teaching resource theories.", "smi teacher researcher theories.", "smi water resource theories.", "m teacher resource theories.", "s's teacher resource theories.", "shi's teacher resource theories."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("smi teacher resource theories.") or ("3 teaching resources survey."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("smi teacher resource theories.") OR ("3 teaching resources survey.")).
• Removing quotes may allow a broader search: (( smi teacher resource theories. ) or ( 3 teaching resources survey. )).
• Adding a wildcard symbol may retrieve word variants: (("smi teacher resource theories.") or ("3 teaching resources survey."))*.