Perhaps you should try some spelling variations:
"smart and sustainable public environment" » "smart and sustainable policy environment", "smart and sustainable solid environment", "smart and sustainable mobility environment", "smart and sustainable public environmental", "smart and sustainable public enrolment"
"Smart and sustainable use environment" » "Smart and sustainable un environment", "Smart and sustainable safe environment", "Smart and sustainable home environment"

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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 use environment") or ("smart and sustainable public environment"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Smart and sustainable use environment") OR ("smart and sustainable public environment")).
• Removing quotes may allow a broader search: (( Smart and sustainable use environment ) or ( smart and sustainable public environment )).
• Adding a wildcard symbol may retrieve word variants: (("Smart and sustainable use environment") or ("smart and sustainable public environment"))*.