Perhaps you should try some spelling variations:
"Smart and sustainable public environment" » "Smart and sustainable public environmental", "Smart and sustainable policy environment", "Smart and sustainable public enrolment", "Smart and sustainable mobility environment", "Smart and sustainable policies environment"
"Smart and sustainable solid environment" » "Smart and sustainable food environment", "Smart and sustainable society environment", "Smart and sustainable land environment", "Smart and sustainable policy environment", "Smart and sustainable social environment", "Smart and sustainable world environment"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("Smart and sustainable public environment") OR ("Smart and sustainable solid environment"))~.
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• Removing quotes may allow a broader search: (( Smart and sustainable public environment ) OR ( Smart and sustainable solid environment )).
• Adding a wildcard symbol may retrieve word variants: (("Smart and sustainable public environment") OR ("Smart and sustainable solid environment"))*.