Perhaps you should try some spelling variations:
"descriptions phase" » "descriptions plate", "descriptions places", "descriptions based"
"descriptive phase" » "descriptive plates", "descriptive clause", "descriptive image"
"descriptors based" » "description based", "descriptors a"
"descriptive case" » "descriptive clause", "descriptive based", "description case"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("descriptive phase") OR ("descriptive case"))) OR ((("descriptions phase") OR ((("descriptor based") OR ("descriptors based")))))).
• Removing quotes may allow a broader search: (((( descriptive phase ) or ( descriptive case ))) or ((( descriptions phase ) or ((( descriptor based ) or ( descriptors based )))))).
• Adding a wildcard symbol may retrieve word variants: (((("descriptive phase") or ("descriptive case"))) or ((("descriptions phase") or ((("descriptor based") or ("descriptors based"))))))*.