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

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