Perhaps you should try some spelling variations:
"smart and sustainable public environments" » "smart and sustainable public environmental", "smart and sustainable policy environments", "smart and sustainable republic environmental", "smart and sustainable built environments", "smart and sustainable policies environments"
"start and sustainable solid environment" » "start and sustainable society environment", "start and sustainable solutions environment", "start and sustainable policy environment", "start and sustainable world environment", "start and sustainable road environment"

Try widening your search to All Fields.

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