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