Perhaps you should try some spelling variations:
"Smart and sustainable policy environment" » "Smart and sustainable policies environment", "Smart and sustainable solid environment", "Smart and sustainability policy environment"
"smart and sustainable public enrolment" » "smart and sustainable built enrolment", "smart and sustainable policies enrolment", "smart and sustainable public involvement", "smart and sustainable public enforcement", "smart and sustainable public employment", "start and sustainable public enrolment"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Smart and sustainable policy environment") OR ("smart and sustainable public enrolment"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Smart and sustainable policy environment\") OR (\"smart and sustainable public enrolment\"))".
• Removing quotes may allow a broader search: (( Smart and sustainable policy environment ) OR ( smart and sustainable public enrolment )).
• Adding a wildcard symbol may retrieve word variants: (("Smart and sustainable policy environment") OR ("smart and sustainable public enrolment"))*.