Perhaps you should try some spelling variations:
"descriptions based" » "description based", "descriptors based", "descriptor based"
"descriptive phase" » "descriptive plates", "descriptions phase", "descriptive clause"
"descriptive image" » "description image", "descriptive data", "descriptive model"
"descriptions part" » "description part", "descriptors part", "descriptions 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 image"))) OR ("descriptive case"))) OR ((("descriptions part") OR ("descriptions based")))).
• Removing quotes may allow a broader search: (((((( descriptive phase ) or ( descriptive image ))) or ( descriptive case ))) or ((( descriptions part ) or ( descriptions based )))).
• Adding a wildcard symbol may retrieve word variants: (((((("descriptive phase") or ("descriptive image"))) or ("descriptive case"))) or ((("descriptions part") or ("descriptions based"))))*.