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