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", "descriptor based", "descriptions a"
"descriptive phase" » "descriptive plates", "descriptive image", "descriptive plan"
"descriptors based" » "descriptor based", "description based", "descriptors a"
"descriptive case" » "descriptive based", "description case", "descriptive name"

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 ("descriptive clause"))))) OR ((("descriptions phase") OR ((("descriptions based") OR ("descriptors based")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"descriptive phase\") or (((\"descriptive case\") OR (\"descriptive clause\"))))) or (((\"descriptions phase\") or (((\"descriptions based\") or (\"descriptors based\"))))))".
• Removing quotes may allow a broader search: (((( descriptive phase ) or ((( descriptive case ) OR ( descriptive clause ))))) or ((( descriptions phase ) or ((( descriptions based ) or ( descriptors based )))))).
• Adding a wildcard symbol may retrieve word variants: (((("descriptive phase") or ((("descriptive case") OR ("descriptive clause"))))) or ((("descriptions phase") or ((("descriptions based") or ("descriptors based"))))))*.